St Thomas Aquinas opens his commentary on the Psalms with the question: how are we to understand them? He approaches his answer by refering to the famous "four causes" of Aristotle, four basic ways to understand a thing, which are:
- Material cause (what a thing is made of)
- Formal cause (the nature of the thing; what it is)
- Final cause (what the thing is for, or what it aims at)
- Efficient cause (what produces the thing)
In the case of a written text, Aquinas understands these more specifically to refer to:- The subject matter (i.e. what is communicated),
- The mode by which that matter is communicated,
- The purpose of communicating it, and
- The author of the text, who is communicating with the reader
He takes as his guide a text from the book of Sirach, where the author imagines the biblical King David composing the Psalms (historically David was believed to be the author of all the Psalms, though modern scholarship does not support this). Aquinas uses the Latin Vulgate, which influences much of his interpretation, but in the RSV it reads:
In all that he did he gave thanks
to the Holy One, the Most High, with ascriptions of glory;
he sang praise with all his heart,
and he loved his Maker.
Sirach 47:8
Subject matter
Aquinas makes the surprising claim that the subject matter of the Psalms is universal - the Psalms speak of everything, or more exactly "all the works of the Lord". He divides these works of God into four categories, giving examples of where he sees them spoken of in the Psalms:
- Creation - e.g. Ps. 8:3
- Governance (especially of His people Israel) - e.g. Ps. 77:11-20
- Restoration (of humanity in Christ, and the effects of grace in the members of Christ's body) - e.g. Ps. 3:5
- Glorification (the new creation in its fullness, the world to come) - e.g. Ps. 149:5
It is common enough to say that the Psalms contain all of human experience - misery, joy, despair, hope, anger, peace, hatred, and love are all found in them. On St Thomas' view, that human universality, while real, is only part of a more total universality. The Psalms are not only a mirror which shows us ourselves, but a window opening onto the whole world, which both comes from and journeys towards the hidden glory of God.
In telling of "all the works of the Lord", the Psalms are a microcosm of Scripture as a whole, and Aquinas believes that this is partly why the Church so often turns to the Psalms in worship. Catholics pray one of the Psalms every Sunday at Mass (notably the only part of the Scripture readings where the congregation "joins in") and many pray the Psalms throughout the day in the Liturgy of Hours. Aquinas suggests we do this not only for their intrinsic beauty and insight, but for their sympathetic resonance with the whole of Scripture and of Christian life.
Mode of communication
If the Psalms speak to us of all God's works, how do they speak to us? This is fairly simple: by way of prayer and praise. If you have read any of the Psalms this hardly needs to be argued for, but Aquinas has a good go at it anyway. Without going into the details of his case, I want to dwell on one point that stuck out at me here.
St Thomas notes that praise of God comes from a kind of spontaneous exaltation of the soul rejoicing in God, that joy spilling over into song. Prayer, on the other hand, he describes as a kind of soliloquy, the deeply personal speech of the one who is "alone with God". Though Aquinas does not explore this, there may be a fruitful tension here between the aspects of prayer that are public - as the love of God finds expression in song, implicitly inviting others to join us - and those that are private - the unique manner in which God can be so intimately present to the soul that we can truly be "alone" and yet "with God". If Aquinas is right, we should expect to find both these elements present in the Psalms.
What have the Psalms ever done for us?
St Thomas turns to the final end or purpose of the Psalms, the good at which the Psalms are aimed. This is whatever answers the question: "Why read the Psalms? What good does it do us?"
As the Psalms teach us by way of prayer, it seems reasonable to say that their goal is the goal of prayer. And so St Thomas draws on an ancient Christian definition of the goal of prayer as "lifting up the mind to God". He elaborates this simple but somewhat vague formula by meditating on the two names of God in the passage from Sirach quoted above: the Holy One, and the Most High. Each of these divine names is paired with two ways in which the mind can be said to rise to God, and each of these ways is paired with the virtue by which we do so.
Lifting up our minds to the Most High, the one who exceeds all we could ever say of him, we first admire God's power by the virtue of faith. We might be uncomfortable with the idea of admiring God for his power, perhaps reminded of those who stroke the ego of powerful politicians in the hope of recieving special treatment. But our knowledge of God's power through faith is the knowledge of what God's power has done, and will do, in creation and salvation. It is a recognition that God's power is not limited as finite, creaturely power is, that God can and has "overcome the world", and that ultimately God will triumph over evil. This admiration, then, is not for the sake of God's ego - God's happiness will not be increased one iota by our praise - but for our sake, to prevent us from despairing of God's saving help.
The second way in which we are lifted to God as the Most High is by our hope to share in the divine beatitude. Beatitude is more than just feeling cheerful, but indicates a happiness found in perfect fulfilment, in being who we are meant to be. The Most High lives in perfect happiness in (for Christians) the eternal communion of the Trinity, and it is to a share in this Triune life that Christ calls us. We don't often think about God's happiness, but I think perhaps we should. It could help to correct a common tendency to see God as a cosmic killjoy, when he is in fact the one who invites us to share a joy greater than any we can know in this life.
We are lifted up to God as the Holy One in two ways. For St Thomas, this name first directs us to God's perfect goodness. Having touched on faith and hope, we will not be surprised to find that Aquinas thinks our minds are raised to God's goodness by charity, the love of God poured into our hearts by the Holy Spirit. More unexpectedly, after this home run of theological (God-centric) virtues, Aquinas suggests that we are finally lifted up to God's perfect justice by imitating it, practicing justice in our own actions. This breaks us out of what might otherwise seem to be a self-enclosed "personal relationship with God", as prayer spills over into working for our neighbour. This is relevant to the whole Church today, which must respond to all kinds of injustice, but especially to the laity who are most integrated into the ordinary life of society, and so are called in a special way to pursue social justice.
"The goal [of the Psalms] is, therefore, that the soul may be joined to God as the Holy One [by justice and love] and the Most High [by faith and hope]."
The author of the Psalms
St Thomas (unlike modern biblical scholarship) takes it for granted that King David was the human author of the entire Psalter. But this is not, for him, the right answer to "who is the author of the Psalms?" If the Psalms spoke only of a truth gained "through human reason", as Aquinas says, then it would be right to label David, or whoever the composers of the Psalms might be, as the principal author(s). But more important to St Thomas, and to us as Christians, is that the Scriptures communicate truth "through the impulse of divine inspiration".
The human author, in this view, is "like the pen of a ready scribe" (Ps. 45:1), an instrument through whom the Holy Spirit speaks to us. That is not to treat Scripture as simply a piece of divine dictation, and so to reject any interest in the historical context and condition of the human author. The Church reminds us that, as a real instrument of the Spirit, the human author is integral to the way God speaks to us in Scripture, and the Psalms are therefore marked by their authors' distinctive human strengths, limitations, and foibles.
Despite this, Christians do not believe that the limitations of the instrument prevent the Holy Spirit from communicating saving truth; and it is the Holy Spirit, not the human author, whose voice we listen out for when we read the Scriptures as God's word. To read the Psalms in this way, as distinct from treating it as a (mere) human product in its historical context, is what makes the difference between a theological reading and a historical reading. While both are valuable, St Thomas is engaged firmly in the former, and so he names the Holy Spirit as the author of the Psalms.