Obviously, this is not a full endorsement.
Can we know God without grace?
The act of the intellect depends upon God in two ways: it has its form by which it acts from God
Preparing the human will
The preparation of the will cannot take place without habitual grace.
Man incurs a triple loss by sinning: stain, corruption of natural good, and debt of punishment (ST 1-2, q. 109, art7).
Christ restores us in the mind but not entirely in the flesh (Thomas is working upon a faulty spirit-flesh dichotomy).
Grace is located in the essence of the soul (q. 110).
Cooperating with God (q. 111)
There is a twofold act in us: interior act of the will, which is moved by God, and the exterior act which is moved by us.
Miracles: q. 111 art. 4. They happen today. Thomas is most certainly (and rightly) a continuationist.
Right order in man’s act (ST 1-2, q. 113 art.1)
Infusion of grace: the logic is that God must change something in our soul for us to be right with him, since sin is a disordering of the soul. “In the infusion of grace there is a certain transmutation of the soul” (ST 1-2, q. 113 art. 3).
It is the effect of cooperating grace (q. 114).
Merit exists on the grounds of God’s ordination (art 1).
Man merits everlasting life condignly (art. 3).