The girding of our loins (Luke 12:35) signifies the readiness of the mind to work hard in every thing praiseworthy…the human mind is awake when it repels any tendency to slumber off into that carelessness that often is the means of bringing it into subjection to every kind of wickedness. When sunk in stupor, the heavenly light within the mind is liable to be endangered… or already is in danger from a violent and impetuous blast of wind (sin). Christ commands us to be awake.
Cyril of Alexandra COMMENTARY ON LUKE, HOMILY 92