When God gives us faith he enters into our soul and speaks to our spirit, not by manner of discourse, but by way of inspiration, proposing in so sweet a manner unto the understanding that which ought to be believed, that the will receives therefrom a great complacency, so great indeed that it moves the understanding to consent and yield to truth without any doubt or distrust, and here lies the marvel: for God proposes the mysteries of faith to our souls amidst obscurities and darkness, in such sort that we do not see the truths but we only half-see them…
… As when exposed to the rays of the sun at mid-day, we hardly see the brightness before we suddenly feel the heat; so the light of faith has no sooner spread the splendour of its truths in our understanding, but immediately our will feels the holy heat of heavenly love.
Faith makes us know by an infallible certitude that God is, that he is infinite in goodness, that he can communicate himself unto us, and not only that he can, but that he will; so that by an ineffable sweetness he has provided us with all things requisite to obtain the happiness of immortal glory…
… The love which we practice in hope goes indeed to God, but it returns to us; its sight is turned upon the divine goodness, yet with some respect to our own profit; it tends to that supreme perfection, but aiming at our own satisfaction. That is to say, it bears us to God, not because he is sovereignly good in himself, but because he is sovereignly good to us, in which as you see there is something of the our and the us, so that this love is truly love.