Elder Ephraim of Katounakia

The Elder observes his disciple's thoughts:
'Come here, my child.'
'How do you regard me?'
'Elder, I consider you an angel.'
'OK. There will come a time when you will see me as a human being.'
After some time; 
'How do you regard me, my child?'
'As a human being.'
'Tomorrow you will see me as the devil.'
And the next day:
'How do you regard me?'
'As the devil.'
That's the way it is. I'm telling you this from experience; the devil attempts to detach you from your elder, to separate you from him!

Elder Ephraim of Katounakia