The more you devote yourself to study of the sacred utterances, the richer will be your understanding of them, just as the more the soil is tilled, the richer the harvest.
The man who is slow to grasp things but who really tries hard is rewarded, equally he who does not cultivate his God-given intellectual ability is condemned for despising his gifts and sinning by sloth.
Learning unsupported by grace may get into our ears; it never reaches the heart. But when God's grace touches our innermost minds to bring understanding, his word which has been received by the ear sinks deep into the heart.
-- Saint Isidore of Seville