It's easy to play any musical instrument: all you have to do is touch the right key at the right time and the instrument will play itself.
Permanence, perseverance and persistence in spite of all obstacle s, discouragement s, and impossibilities: It is this, that in all things distinguishes the strong soul from the weak.
Humor has historically been tied to the mores of the day. The Yellow Kid was predicated on what people thought was funny about the immigrant Irish. When you're different in a society, you're funny.

