A small affliction borne for God’s sake is better before God than a great work performed without tribulation, because affliction willingly borne brings to light the proof of love. But a work of leisure proceeds from a self-satisfied conscience. That is why the saints were proved by tribulations for Christ’s love, and not by ease. For good works accomplished without toil are the righteousness of those in the world, who do righteous deeds with their possessions but not their bodies, thus gaining nothing within themselves. But you, O struggler, taste within yourself Christ’s suffering, that you may be deemd worthy of tasting His glory. For if we suffer with Him, then we are glorified with Him (cf. Rom. 8:17).
–Saint Isaac of Syria (Seventh Century)