I have to humbly agree with Abigail-II on this. Learn much about everything you can, in order to improve what you have committed yourself to do best.

No offense intended by the following pontification but, I think that life will prove that the only way to be a true master of any one thing is, to steer between both obstacles to personal growth: obsession (which is slavery, and makes an empty man) and, distraction (which is mediocrity, and makes a shallow man).
mkmcconn
(added 3 words + bold tags)