To know everything means not knowing anything well enough, you know, for Jack of all trades is the master of none.

[Steroids]

:)

Jack of all trades

n 1: a person able to do a variety of different jobs acceptably well [syn: Jack of all trades] 2: a man skilled in various odd jobs and other small tasks [syn: handyman, odd-job man]
(From dictionary.com)

Have a great day, all.
Steroids