"Christ dwells in us"

"CHRIST dwells in us, namely, when we know that we hold the faith which the Catholic Church teaches and holds. But if it is taken in regard to the affectivity, then Christ dwells in us by formed faith; and in this way no one can know that Christ dwells in him, or that he has charity, unless this certainty be granted to a person by revelation and a special grace. But there is nothing to prevent us from having a conjecture [coniecturum] that we are in charity, namely, when a person finds himself so ready and disposed that he would not wish to do anything against Christ in any way for something temporal: “Beloved, if our hearts do not condemn us, we have confidence before God” (1 Jn. 3:21)."

~St. Thomas Aquinas: Commentary on 2 Corinthians, (2 Cor. 13:5-10) 13, lect. 2, 527. 

The Temptation of St. Thomas Aquinas, by Bernardo Daddi.

Poplar, 1338; Staatliche Museen, Berlin.