Let your countenance be pleasant, but in serious matters let it be somewhat grave.

External nature is only internal nature writ large.

Condemn none: if you can stretch out a helping hand, do so. If you cannot, fold your hands, bless your brothers, and let them go their own way.

Only when you combine sound intellect with emotional discipline do you get rational behavior.

Though this be madness, yet there is method in't.

You speak an infinite deal of nothing.