Elder Paisios says:
The elder said: Humility is acquired after struggles. When you know yourself you acquire humility, which become a (permanent) condition. Otherwise one can become humble for a moment, but your thought will say to you that you are something although in reality you're nothing. and you'll be deluded like that to the moment of death. If death finds you with the thought that you are nothing, then God will speak. If however your thought says at the hour of death that you are something and you don't understand it, all your effort goes to waste.
“Ask for repentance in your prayer and nothing else, neither for divine lights, nor miracles, nor prophecies, nor spiritual gifts—nothing but repentance. Repentance will bring you humility, humility will bring you the Grace of God, and God will have in His Grace everything you need for your salvation, or anything you might need to help another soul." - Elder Paisioshttp://www.fatheralexander.org/booklets/english/elder_paisios_mount_athos.htm