There is nothing permanent except change. Nothing is permanent except change. The only constant is change. Change is the only constant. Change alone is unchanging.
Those who love wisdom must investigate many things
You may travel far and wide but never will you find the boundaries of the soul.
What is divine escapes men's notice because of their incredulity.
You can never step in the same river twice.
Knowledge of divine things for the most part is lost to us by incredulity.