"The struggle for existence holds as much in the intellectual as in the physical world. A theory is a species of thinking, and its right to exist is coextensive with its power of resisting extinction by its rivals."

"The improver of natural knowledge absolutely refuses to acknowledge authority, as such. For him, skepticism is the highest of duties blind faith the one unpardonable sin."

"Proclaim human equality as loudly as you like, Witless will serve his brother."

"I protest that if some great Power would agree to make me always think what is true and do what is right, on condition of being turned into a sort of clock and would up every morning before I got out of bed, I should instantly close with the offer."

"My humanitarian work evolved from being with my family. My mom, my dad, they really set a great example for giving back. My mom was a nurse, my dad was a school teacher. But my mom did a lot of things for geriatrics and elderly people. She would do home visits for free."

"How do you rebel in a family of rebels?"

"What a distressing contrast there is between the radiant intelligence of the child and the feeble mentality of the average adult."

"I think if you give your best as a parent, then that's all you can do."