Imitation of Christ

Si scires totam Bibliam, et omnium philosophorum dicta quid totum prodesset, sine charitate et gratia? Vanitas vanitatum et omnia vanitas præter amare Deum et illi soli fervire. Ista est summa sapientia per contemptum mundi tendere ad regna cælestia.

If you knew the whole Bible, and the sayings of all the philosophers, what should all this profit you without the love and grace of God? Vanity of vanities, all is vanity, save to love God, and Him only to serve. That is the highest wisdom, to cast the world behind us, and to reach forward to the heavenly kingdom.

Imitation of Christ, I, 1:3