via.Aesthesia:

Generalist / Specialist: proportion

The common Generalist vs Specialist aphorism is less often stated as: “Jack of all trades, master of none, though oftentimes better than master of one.” See this link for how other cultures, speak rarely postively on such variation on: Process Style. Or, more fundamentally: Proportion.

http://en.wikipedia.org/wiki/Jack_of_all_trades,_master_of_none