“Those things that hurt, instruct.”
“That which hurts, also instructs.”
“It is in vain for man to endeavor to instruct man in those things which the Holy Spirit alone can teach.”
“The things that hurt us the worst in life end up being the same as those that mean to us the most.”
“The power of instruction is seldom of much efficacy, except in those happy dispositions where it is almost superfluous.”
“The surest way to corrupt a youth is to instruct him to hold in higher esteem those who think alike than those who think differently.”