Gregory the Great
Patristic
c. A.D. 540–604
“For he sleeps in the midst of the sea who, placed among the temptations of this world, neglects to look out for the motions of vices that rush in upon him like impending heaps of waves. And the steersman, as it were, lets go the rudder when the mind loses the earnestness of solicitude for guiding the ship of the body. For, indeed, to let go the rudder in the sea is to leave off intentness of forethought among the storms of this life. For, if the steersman holds fast the rudder with anxious care, he now directs the ship among the billows right against them, now cleaves the assaults of the winds aslant. So, when the mind vigilantly guides the soul, it now surmounts some things and treads them down, now warily turns aside from others, so that it may both by hard exertion overcome present dangers, and by foresight gather strength against future struggle.”