What do you understand by "to be everything, simultaneously means to be not

Question:

What do you understand by "to be everything, simultaneously means to be nothing."?

Best Answer - Chosen by Asker: It is the same as "Jack of all trades, master of none."

It takes concentration of effort on one subject to become a master. When you scatter your energies over too many subjects, you can never learn all there is to know about any one of them. Think of the term "Scatter brain".

Look at those "All In One" printer, scanner, fax machines. Sure, they print,scan and fax.... but they do none of these functions extremely well.