We do not reach the final stage of spiritual maturity through divine power and grace alone, without ourselves making any effort; but neither on the other hand do we attain the final measure of freedom and purity as a result of our own diligence and strength alone, apart from any divine assistance. “If the Lord does not build the house, it is said, and protect the city, in vain does the watchman keep awake, and in vain do the laborer and the builder work.”  (Psalm 127:1)
–Saint Macarius the Great (295-392)