“’A monk must love God as a son and fear him as a slave.’
Says Evagrius. In fact, this is so of every Christian, even if he is not a monk. It is a great art to unite love for God to fear of Him. Many other of the Holy Fathers also, when they speak of love for God, speak at the same time of fear of Him- and vice versa…the greatest love towards God of which man is capable can be turned into pride if it is not accompanied by a sense of fear- and great fear without love leads to despair.”
St. Nikolai Velimirovic