If at some time you show mercy to someone, mercy will be shown to you.
If you show compassion to one who is suffering (and of course, this is not a great deed) you will be numbered among the martyrs.
If you forgive one who has insulted you, then not only will all your sins be forgiven, but you will be a child of the Heavenly Father.
If you pray from all your heart for salvation - even a little - you will be saved.
If you rebuke yourself, accuse yourself, and judge yourself before God for your sins, with a sensitive conscience, even for this you will be justified.
If you are sorrowful for your sins, or you weep, or sigh, your sigh will not be hidden from Him and, as St. John Chrysostom says, "If you only lament for your sins, then He will receive this for your salvation."
St. Moses of Optina
Fasting, prayer, alms, and every other good Christian deed is good in itself, but the purpose of the Christian life consists not only in the fulfillment of one or another of them. The true purpose of our Christian life is the acquisition of the Holy Spirit of God. But fasting, prayer, alms and every good deed done for the sake of Christ is a means to the attainment of the Holy Spirit. Note that only good deeds done for the sake of Christ bear the fruit of the Holy Spirit. Everything else that is not done for the sake of Christ, even if it is good, does not bring us a reward in the life to come, not does it bring the grace of God in this life. This is why our Lord Jesus Christ said, "Whoever gathereth not with me scattereth" (Matt. 12:30).
(St. Seraphim of Sarov, Conversation on the Goal of the Christian Life)
