4 Thence also He says here, if you turn your attention to it, “No man comes to me except he whom the Father shall draw.” Do not think that you are drawn against your will. The mind is drawn also by love. Nor ought we to be afraid, lest perchance we be censured in regard to this evangelic word of the Holy Scriptures by men who weigh words, but are far removed from things, most of all from divine things; and lest it be said to us, “How can I believe with the will if I am drawn?”
I say it is not enough to be drawn by the will; you are drawn even by delight. What is it to be drawn by delight? “Delight yourself in the Lord, and He shall give you the desires of your heart.” There is a pleasure of the heart to which that bread of heaven is sweet. Moreover, if it was right in the poet to say, “Every man is drawn by his own pleasure,” — not necessity, but pleasure; not obligation, but delight—how much more boldly ought we to say that a man is drawn to Christ when he delights in the truth, when he delights in blessedness, delights in righteousness, delights in everlasting life, all which Christ is?
Or is it the case that, while the senses of the body have their pleasures, the mind is left without pleasures of its own? If the mind has no pleasures of its own, how is it said, “The sons of men shall trust under the cover of Your wings: they shall be well satisfied with the fullness of Your house; and You shall give them drink from the river of Your pleasure. For with You is the fountain of life; and in Your light shall we see light”? Give me a man that loves, and he feels what I say.
Give me one that longs, one that hungers, one that is travelling in this wilderness, and thirsting and panting after the fountain of his eternal home; give such, and he knows what I say. But if I speak to the cold and indifferent, he knows not what I say. Such were those who murmured among themselves. “He whom the Father shall draw,” says He, “comes unto me.”
Source: Tractates on the Gospel of John (New Advent)