Nikos Kazantzakis said this quote
“ The struggle between God and man breaks out in everyone, together with the longing for reconciliation. Most often this struggle is unconscious and short-lived. A weak soul does not have the endurance to resist the flesh for very long. It grows heavy, becomes flesh itself, and the contest ends. But among responsible men, men who keep their eyes riveted day and night upon the Supreme Duty, the conflict between flesh and spirit breaks out mercilessly and may last until death. ”