You cannot.

You will only be unhappy if you try.

No man can do it.

You must learn your limitations or suffer all your days." "Limitations!" He repeated the words with measureless scorn.

"If I learn them at all," he declared, with unexpected force, "it will be with scars and bruises, for nothing else will content me." "We are, I should say, almost the same age," she remarked slowly.
"I am twenty-five," he told her.
"I am twenty-two," she said.