The name of God…

In times of affliction, unceasingly call out to the merciful God in prayer. The unceasing invocation of the name of God in prayer is a treatment for the soul which kills not only the passions, but even their very operation. As a doctor finds the necessary medicine, and it works in such a way that the sick person does not understand, in just the same way the name of God, when you call upon it, kills all the passions, although we don’t know how this happens.
— Saint Barsanuphius the Great (Sixth Century)

The soul is like a ship…

The soul is like a ship: sometimes it is sunk by a mighty swell from without, sometimes from within because the bilge is overflowing. So too are we sometimes lost through sinful practices on the outside, sometimes defiled by logismoi [evil thoughts] within. So we must watch out for the attacks of the spirits from outside and drain off the impurities of the logismoi within.
–Saint Synkletike (a Desert Mother) (d. 350)