Sometimes we get sad about things and we don’t like to tell other people that we are sad about them. We like to keep it a secret. Or sometimes, we are sad but we really don’t know why we are sad, so we say we aren’t sad but we really are.

The brain is not a general-purpose computer but a collection of specialized circuits designed to solve specific adaptive problems.

Don't be afraid to stand alone for what you believe in.

我做事情不是为了钱，而是因为我热爱它们。

Sustainability is not an option; it's a responsibility we owe to future generations.

我们在这里是为了在宇宙中留下痕迹。不然我们为什么在这里？