On self-restraint and purity

Bodily fasting alone is not enough to bring about perfect self-restraint and true purity; it must be accompanied by contrition of heart, intense prayer to God, frequent meditation on the Scripture, toil and manual labor.  These are able to check the restless impulses of the soul and to recall it from its shameful fantasies.  Humility of soul helps more than everything else, however, and without it no one can overcome unchastity or any other sin.  St. John Cassian