It is the saying of an ancient sage that humor was the only test of gravity, and gravity of humor.

Giving advice is sometimes only showing our wisdom at the expense of others.

Don't go looking for boys in the dark
They will say pretty things then
leave you with scars.
Do go looking for boys in the park
For that is where the true gentlemen are.

A word to the wise ain't necessary, it is the stupid ones who need all the advice

You gotta look out for number one, but don't step in number two!

The greatest of fools is he who imposes on himself, and in greatest concern thinks certainly he knows that which he has least studied, and of which he is profoundly ignorant.