Look at a day when you are supremely satisfied at the end. It's not a day when you lounge around doing nothing; it's a day you've had everything to do and you've done it.
Be scrupulously truthful, even when truth is inconvenient, for it is more inconvenient when you try to conceal it.
Ignoring isn’t the same as ignorance, you have to work at it.
Every equation we write is a small step towards understanding the cosmos, but the journey is infinite.