Thomas is not typically viewed as a theologian of gift, but Matthew Levering argues that Thomas teaches that the Trinity is a communion of gift-giving. Thomas says in a comment on John 5:20, “because the Father perfectly loves the Son, this is a sign that the Father has shown him everything and has communicated to him his very own power and nature.” The Father communicates all He is and has to the Son, so that the begetting of the Son is an act of self-giving.

Further, on John 3:34, “God the Father is said to give the Holy Spirit without measure to Christ as God, because he gives to Christ the power and might to spirate the Holy Spirit, who, since he is infinite, was infinitely given him by the Father: for the Father gives it just as he himself has it, so that the Holy Spirit proceeds from him as much as from the Son. And he gave him this by an everlasting generation.”