By St. Nikolai Velimirovich
"Everyone who lives on milk lacks experience of the word of righteousness, for he is a child. But solid food is for the mature, for those whose faculties are trained by practice to discern good and evil" (Hebrews 5:13-14).
Those who feed on the food of the milk of sensual reflection cannot easily distinguish between good and evil. They usually come to the conclusion that all Faiths are equally the same in value; that sin is the indispensable shadow of virtue; that evil, in general, is the unavoidable companion of good. A true Christian cannot come to such erroneous conclusions.
A true Christian is a mature person who is not fed of milk, one who is distrustful of the senses, one who judges much finer and makes a finer distinction between the values of all that is and all that was. To the Christian, indeed, is given clear distinction of God's Revelation for distinguishing good from evil; nevertheless, for him [the Christian] a long and laborious study is necessary in order that he, as being perfect, could in every given case know what is good and what is evil. This knowledge should pass over into feeling in order to be trustworthy and without error. Both good and evil wish to touch the heart of man. That is why man should be trained, with his feeling in the heart, to immediately recognize what approaches him in the same manner, as with his tongue he immediately senses the salty and the unsalty, the sweet and the bitter.
Brethren, let us endeavor every day and every moment to sharpen our heart that the heart could always distinguish good and evil. For everything that happens to us, the question is posed: What is good and what is evil? Precisely everything that happens to us, happens to us so that we could realize what is good and to follow after good. We place ourselves in such temptations even a hundred times a day. He who has eyes to see, let him see.
O Lord, Lover of mankind, warm our hearts with good which is from You. Make us wise, O Lord, to be able to distinguish good from evil. O Master, strengthen us that we should always embrace good and discard evil for the sake of Your glory, O Lover of mankind, and for the sake of our salvation.