But greatly must we mourn and lament over our lukewarmness and negligence, that we are not drawn by greater affection to become partakers of Christ, in whom all the hope and the merit of those that are to be saved consist. For He Himself is our sanctification and redemption. He is the consolation of pilgrims and the eternal fruition of the Saints. Therefore it is grievously to be lamented that many so little consider this health-giving mystery, which maketh heaven glad and preserveth the whole world. Alas for the blindness and hardness of man's heart, that he considereth not more this unspeakable gift, and even slippeth down through the daily use, into carelessness.
The Imitation of Christ, Book Four