To know good and evil is not enough； one must also do them.

唯一存在的限制是你给自己设定的限制。

No arts; no letters; no society; and which is worst of all, continual fear, and danger of violent death; and the life of man, solitary, poor, nasty, brutish, and short.

Technology itself is neither good nor evil; the key lies in the people who use it.

Keep your circle small and your dreams big.