The sick one who is acquainted with his sickness is easily to be cured; and he who confesses his pain is near to health.
Many are the pains of a hard heart; and when the sick one resists the physician, his torments will be augmented.
There is no sin which cannot be pardoned except that one which lacks repentance, and there is no gift which is not augmented save that which remains without acknowledgement. For the portion of the fool is small in his eyes.
[Mar Isaac the Syrian, Treatise II, Six Treatises on the Behaviour of Excellence, Ascetical Homilies]