It’s not in your interest (Saint Mark the Ascetic)

Don’t make excuses and say that you don’t know what you should do and think you’re not responsible for what you haven’t done. Because if you’d done your best, the rest would have been revealed to you later, just as you go from one room to another and learn on the way. It’s not in your interest to learn the next things theoretically before you’ve mastered the first things practically.