Edit: Okay, so people have given some mixed reviews about the quote. For starters, the context of the book matters a lot. I'm a huge believer in doing what you love and doing it with everything that you have. But this book by Ian Caldwell, “The Rule of Four”, has some other great quotes I'll share.
“Hope,… which whispered from Pandora's box after all the other plagues and sorrows had escaped, is the best and last of all things. Without it, there is only time. And time pushes at our backs like a centrifuge, forcing outward and away, until it nudges us into oblivion… It's a law of motion, a fact of physics…, no different from the stages of white dwarves and red giants. Like all things in the universe, we are destined from birth to diverge. Time is simply the yardstick of our separation. If we are particles in a sea of distance, exploded from an original whole, then there is a science to our solitude. We are lonely in proportion to our years.” ― Ian Caldwell, The Rule of Four
“I'd begun to realize that there was an unspoken predjudice among book-learned people, a secret conviction they all seemed to share, that life as we know it is an imperfect vision of reality, and that only art, like a pair of reading glasses can correct it.” ― Ian Caldwell, The Rule of Four
“Love lost is a special kind of failure, I think. It's a reminder that some consummations, no matter how devoutly wished for, never come; that some apes will never be men, not in all the world's ages.” ― Ian Caldwell, The Rule of Four
“So ended the formative period in his life, the single year that set in motion all the clockwork of his future identity. Thinking back on it, I wonder if it isn't the same for all of us. Adulthood is a glacier encroaching quietly on youth. When it arrives, the stamp of childhood suddenly freezes, capturing us for good in the image of our last act, the pose we struck when the ice of age set in.” ― Ian Caldwell, The Rule of Four
“A son is a promise that time makes to a man, the guarantee every father receives that whatever he holds dear will someday be considered foolish, and that person he loves best in the world will misunderstand him.” ― Ian Caldwell, The Rule of Four