“Do not worry about your difficulties in Mathematics. I can assure you mine are still greater.”

“I was walking home the other night, and I was thinking about it, and do you worry that when you're old you will be on your own?”

“Don't worry about anything. Just do what you can and be the best you can be.”

“If you're doing your best, you won't have time to worry about failure.”

“I’ve been through a lot and I realize the future can’t be controlled. I’m not worried. You can always learn to overcome difficulties.”

“I have this kind of philosophy that I can't do anything about what happened yesterday, or what's going to happen tomorrow. But I feel in full control of what's going on now. I think worry will make you sick. I've never seen it accomplish anything. I've never seen worrying about anything change it. So I decided not to do it. If you can't do anything about it, why in the hell worry about it? Every negative thought you have releases poison into your system, and will kill you or give you cancer, or tumors or whatever else you can think of. So if you are thinking negative about anything, erase that.”

“To go for your dreams, you have to use action, thinking is not enough. Every day what am I studying about, that can help me, that can empower me to become better at what I do - become a greater version of myself. It's not about success or failure it's about enjoying what you do - have fun.”

“God does not care about our mathematical difficulties. He integrates empirically.”

“Don't worry about your originality. You couldn't get rid of it even if you wanted to. It will stick with you and show up for better or worse in spite of all you or anyone else can do.”

“Do the people of the South really entertain fears that a Republican administration would, directly or indirectly, interfere with their slaves, or with them, about their slaves? If they do, I wish to assure you, as once a friend, and still, I hope, not an enemy, that there is no cause for such fears.”