Repentance

Repentance is the renewal of baptism. Repentance is a contract
with God for a second life. A penitent is a buyer of humility.
Repentance is constant distrust of bodily comfort. Repentance is
self-condemning reflection, and carefree self-care. Repentance is
the daughter of hope and the renunciation of despair.

A penitent is an undisgraced convict. Repentance is reconciliation with the
Lord by the practice of good deeds contrary to the sins.
Repentance is purification of conscience. Repentance is the
voluntary endurance of all afflictions. A penitent is the
inflicter of his own punishments. Repentance is a mighty
persecution of the stomach, and a striking of the soul into
vigorous awareness.

St. John Climacus  (c. 7th Century CE, also known as John of the Ladder