A proud Christian needs no demon. He has turned into one, an enemy to himself.
Darkness is alien to light. Pride is alien to every virtue. St. John Klimakos -The Ladder of Divine Ascent “On Pride”
An excellent faster is he who restrains himself from every impurity, who imposes abstinence on his tongue and restrains it from idle talk, foul language, slander, condemnation, flattery and all manner of evil speaking, who abstains from anger, rage, malice and vengeance and withdraws from every evil. Saint Tikhon of Zadonsk
If Thou, O man, dost not forgive everyone who has sinned against thee, then do not trouble thyself with fasting. If thou dost not forgive the debt of thy brother, with whom thou art angry for some reason, then thou dost fast in vain God will not accept thee. Fasting will not help thee, until thou wilt become accomplished in love and in the hope of faith. Whoever fasts and becomes angry, and harbors enmity in his heart, such a one hates God and salvation is far from him. St. Ephraim the Syrian
An elder said: “The voice itself shouts to man until his last breath: ‘Turn around (repent; μεταναοω) today!’”
The Anonymous Sayings of the Desert Fathers (p. 13). Cambridge University Press.
“The voice” can be taken as the conscience. -Fr. P
If pride turned some of the angels into demons, then humility can doubtless make angels out of demons. So take heart, all you sinners. St. John Klimakos -The Ladder of Divine Ascent “On Humility”
A solitary horse can often imagine itself to be at full gallop, but when it finds itself in a herd it then discovers how slow it actually is.
St. John Klimakos -The Ladder of Divine Ascent -On Humility
Who has ears to hear, let them hear.
The same father (Gregory the Theologian) said: “God requires these three things of every man who has been baptized: right belief of his soul, truth of his tongue and sobriety of his body.”
The Anonymous Sayings of the Desert Fathers (p. 9). Cambridge University Press.