" Some people who leave the line of exertion and struggle with a feeling of guilt, which every fugitive and truant is bound to feel, are likely to defend themselves and criticize their friends who continue to serve. It is almost impossible for such people to escape their deviation and return to their original line. Prophet Adam, upon him be peace, recovered his previous rank with a single deed, namely his confession of fault, after he had fallen into forgetfulness. By contrast, Satan, despite the gravity of his sin, tried to defend himself and fell into eternal frustration. "

Fethullah Gülen