What is Enough?

The dictionary define enough as:

adjective

1.

adequate for the want or need; sufficient for the 

purpose or to satisfy desire:

enough water; noise enough to wake the dead.

pronoun

2.

an adequate quantity or number; sufficiency.

adverb

3.

in a quantity or degree that answers a purpose or satisfies a need ordesire; sufficiently.

How do you know when you have enough?