For if you cannot give as much as those rich men who put their gifts in the treasury, then give the two pennies like that poor widow and God will receive this from you as more than the gifts of those rich men (cf. Mk. 12:42, Lk. 21:2).
And if you do not have even this much you have strength and you can show mercy to your infirm brother by serving him.
You cannot do even this? Then you can comfort you brother by a word. Show him mercy by words, and you will hear what has been said, Lo, is not a word better than a gift? (Sir. 18:17).
And if you cannot help him even by words, then, when your brother becomes angry at you for something you can show him mercy and endure him during the time of his disturbance, seeing that he is tempted by the common enemy, and instead of speaking a word to him that disturbs him all the more, you can remain silent.
By this you will show him mercy, delivering his soul from the enemy. And when your brother sins before you, have mercy on him and forgive him his sin, so that you also might receive forgiveness from God; for it is said, forgive, and ye shall be forgiven (Luke 6:37).
You can show your mercy for the soul of your brother by forgiving him for his sin against you, for God gave us the authority, if we wish, to forgive each other the transgressions which transpire amongst us.
In this way, not having any means to show mercy to his body, you have had mercy on his soul. What mercy or alms could be greater than mercy toward his soul? As the soul is more precious than the body, so mercy shown to the soul is greater than that shown to the body.
Therefore no one can say, “I cannot give alms or show mercy,” for everyone can show mercy according to his strength and the disposition of his soul.
[…] We have said that one who performs virtue sensibly is a skilled artisan who builds his house securely. The Gospel also says (cf. Mt. 7:24, 25), that a wise man builds his dwelling upon a rock, and no opposing force can cause it to fall.
May God the Lover of man grant us to hear and to fulfill what we hear, so that these words will not serve for our judgment on the Day of Judgment. For to Him belongs glory unto the ages. Amen.
Dorotheos of Gaza (505-565 or 620): Conference 14 – On the Building and Construction of the Soul’s House of Virtues @ Pravoslavie.