唯一的限制是你给自己设下的限制。
The only limits that exist are the ones you place on yourself.
Let him only see the thorns who has eyes to see the rose.
"The essence of mathematics is not to make simple things complicated, but to make complicated things simple."
"We are what we repeatedly do. Excellence, then, is not an act, but a habit."
The past is never dead. It's not even past.
On new ideas: "There'll always be serendipity involved in discovery."