That quote from St Basil on the Psalms that’s going around is legit – it’s a recent translation of at least two parts of his Homily 10 on Psalm 1, found in volume 46 of a series of patristic texts published in the 1950s by CUA Press.
Here’s the quote:
“Any part of the Scriptures you like to choose is inspired by God. The Holy Spirit composed the Scriptures so that in them, as in a pharmacy open to all souls, we might each of us be able to find the medicine suited to our own particular illness.
Thus, the teaching of the Prophets is one thing, and that of the historical books is another. And, again, the Law has one menaing, and the advice we read in the Book of Proverbs has a different one. But the Book of Psalms contains everything useful that the others have. It predicts the future, it recalls the past, it gives directions for living, it recalls the past, it gives directions for living, it suggests the right behavior to adopt. It is, in short, a jewel case in which have been collected all the valid teachings in such a way that individuals find remedies just right for their cases.
It heals the old wounds of the soul and gives relief to recent ones. It cures the illnesses and preserves the health of the soul.
Every Psalm brings peace, soothes the internal conflicts, calms the rough waves of evil thoughts, dissolves anger, corrects and moderates immorality.
Every Psalm preserves friendship and reconciles those who are separated. Who could actually regard as an enemy the person beside whom they have raised a song to the one God?
Every Psalm anticipates the anguish of the night and gives rest after the efforts of the day. It is safety for babes, beauty for the young, comfort for the aged, adornment for women.
Every Psalm is the voice of the Church.”