Sydney J. Harris said this quote

The generality of mankind is lazy. What distinguishes men of genuine achievement from the rest of us is not so much their intellectual powers and aptitudes as their curiosity, their energy, their fullest use of their potentialities. Nobody really knows how smart or talented he is until he finds the incentives to use himself to the fullest. God has given us more than we know what to do with.

~ Sydney J. Harris

What is much harder to handle is the sense that you have to live up to the mark someone else has set for you. The grades become too important, the competition too frantic, the fear of disappointing those who believe in you turns into an overwhelming nightmare. And it is desperately unfair to the boy. He cannot live his parents' life over again for them. He cannot make up for their own lacks, their own unfulfillments. He cannot carry their torch -- only his own.

~ Sydney J. Harris

And the end of this paradox is that only when the child is thus free can he have the proper attachment to his parents; only when we allow his independence can he then freely offer us love and respect, without conflict and without resentment. It is the hardest lesson to learn that the goal of parenthood is not to reign forever but to abdicate gracefully at the right time.

~ Sydney J. Harris

And most of the failures in parent-child relationships, from my observation, begin when the child begins to acquire a mind and a will of its own, to make independent decisions and to question the omnipotence or the wisdom of the parent.

~ Sydney J. Harris