“Looks fade with time, but the heart and mind only grow more beautiful.”

“We must not dwell on what we do not have, but we must not forget either, so that we may have something to strive for.”

“Don't wish. Don't Start. Wishing only wounds the heart.”

“As you grow, you learn more. If you stayed as ignorant as you were at twenty-two, you'd always be twenty-two. Aging is not just decay, you know. It's growth. It's more than the negative that you're going to die, it's the positive that you understand you're going to die, and that you live a better life because of it.”

“Remembering is my only job and it's hard work. We are natural-born amnesiacs, hardwired to let go of the past, to release ourselves from history; the only way to withstand our pain is to forget our pain. We may think we don't forget, but we do. Time wears down the rough edges of our memory, sure as a stone on the river bank is smoothed by the rushing current. And like the eroding stone, the memory fades so gradually we don't even feel it. We don't notice. Eighteen years fly by, whoosh, and we don't even realize that not long ago, we didn't all drink bottled water, the Soviet Union loomed as a threat, smoking was commonplace in restaurants, and Bono was just a rockstar. What I want... all I want... is not to forget. But it's an uphill battle. Over time, the image blurs, the scent dissipates, the memory fades. ”

“I believe if I refuse to grow old,I can stay young 'til I die.”

“My earliest memories are of CP4 — that's a Kähler manifold that looks locally like a vector space with four complex directions, though the global topology's quite different. But I didn't really grow up there; I was moved around a lot when I was young, to keep my perceptions flexible. I only used to spend time in anything remotely like this" — he motioned at the surrounding more-or-less-Euclidean space — for certain special kinds of physics problems. And even most Newtonian mechanics is easier to grasp in a symplectic manifold; having a separate visible coordinate for the position and momentum of every degree of freedom makes things much clearer than when you cram everything together in a single three-dimensional space.”