When a man receives something Divine, in his heart he rejoices; but when he receives something diabolic, he is disturbed. The Christian heart, when it has received something Divine, does not demand anything else in order to convince it that this is precisely from the Lord; but by that very effect it is convinced that this is heavenly, for it senses within itself spiritual fruits: love, joy, peace, and the rest (cf. Gal. 5:22).
Seraphim of SarovThe body is a slave, the soul a sovereign, and therefore it is due to Divine mercy when the body is worn out by illness: for thereby the passions are weakened, and a man comes to himself; indeed, bodily illness itself is sometimes caused by the passions.
Seraphim of Sarov... the people who, in spite of the bonds of sin which fetter them and hinder them (by constraint and by inciting them to new sins), come to Him, our Savior, with perfect repentance for tormenting Him, who despise all the strength of the fetters of sin and force themselves to break their bonds ? such people at last actually appear before the face of God made whiter than snow by His grace. 'Come, says the Lord: Though your sins be as scarlet, I will make them whiter than snow' (Isa. 1:18).
Seraphim of Sarov