St. Ignatius (Brianchaninov). "On Prelest". About Animal and Spiritual Zeal.
A monk must surely beware of carnal and animal zeal, which appears pious outwardly but in reality is irrational and bringing harm to the soul. Wordly people and many monks, in their ignorance and inexperience, often praise such zeal without understanding that it springs from conceit and pride. They praise this zeal as zeal for the faith, for piety, for the Church, for God. It consists in a more or less strong condemnation and criticism of one's neighbours in their moral faults, and in faults against church orders.
Deceived by a wrong conception of zeal, these impudent zealots think that by yielding themselves to it they are imitating the Holy Fathers and holy martyrs, forgetting that they, i.e. the zealots - are not saints, but sinners.
If the saints accused or convicted those who were living in sin or heresy, they did so at the command of God, as their duty, by inspiration of the Holy Spirit, not at the instigation of their passion and demons. Whoever decides of his own self-will to convict his brother or make some reprimand, clearly betrays and proves that he considers himself more prudent and virtuous than the person he blames, and that he is acting at the instigation of passion and deception and diabolic thoughts.
We need to remember the Saviour's injuction: "Why beholdest thou the mote that is in thy brother's eye, but considerest not the beam that is in thine own eye? Or how wilt thou say to thy brother, Let me pull out the mote out of thine eye; and, behold, a beam is in thine own eye? Thou hypocrite, first cast out the beam out of thine own eye; and then shalt thou see clearly to cast out the mote out of thy brother's eye" (Mat.7:3-5)
