Guard your mind from ...

Guard your mind from self-praise and flee a high opinion of yourself, so that God does not allow you to fall into the opposite passion to the virtue for which you boast, for man does not accomplish virtue alone, but with the help of God who sees all.
 Marcus Eremita

Quotes from the same author

God tested Abraham. That is, he sent him afflictions for his benefit, not so that he could find out what sort of man he was, for God knows everything, but so that He give him the means to perfect his faith.
 Marcus Eremita
He who willingly accepts chastening by affliction is not dominated by evil thoughts against his will; whereas he who does not accept affliction is taken prisoner by evil thoughts, even though he resists them.
 Marcus Eremita
A man who hates the passion cuts off their causes. But a man who remains among their causes experiences even against his will the conflict from the passions. It is not possible to be mentally inclined toward a passion if one does not love its cause. For who, disdaining shame, is given to vainglory? Or who, loving lowliness, is bothered by dishonor? Who, having a broken and humble heart, accepts fleshly sweetness? Or who, believing in Christ, is concerned about temporal things, or argues about them?
 Marcus Eremita
In the spiritual life we can do nothing worthy without repentance, but the Lord has much mercy on us because of our intentions. He who compels himself and holds on to repentance until the end, even if he sins is saved because he compelled himself, for the Lord promised this in the Gospel.
 Marcus Eremita
A man who is enticed by sinful thoughts is blinded by them, and he sees the action of sin in himself, but he can not see the cause of this action.
 Marcus Eremita