The greatest wisdom is to know thyself.

The capacity of the human mind for forming and manipulating symbols is what sets us apart from other animals.

The strength of the people is like the strength of water, it can carry the boat, but it can also overturn it.

The more we learn about sensory biology, the more we realize how intricate and finely tuned our nervous system is.

下山比上山容易，但最好的视野在山顶。