Thought is provoked by conscious and unconscious impulses. You can limit your subconscious and can only be guided by experience. Reason determines itself but it also affects what opposes it.
Doing everything to overcome passion, instinct and later finding yourself in an open sea in the eye of the storm.
All the temptation to be all that one cannot be, all the strength to comprehend the incomprehensible and all the taste of consciousness of what one really is.