Hello,
this is a famous saying that " Jack of trades but master of none"
it means if you want to make you a perfect man in many
jobs, you are going to lose and if you are going to be
perfect in one thing especially when you are going to be
a professional in your work and now professionalism
is more valuable than other things as you know many
things to do but not master in anything else. So it is
better never waste your time in learning many things
just learn one thing but perfectly and accurately.
People always respect a professional, not others.
"I love drawing and want to be expert in this", says
a man to me in last night. His saying is perfect and
according to his taste and passion. Please prove
yourself a professional and make this saying wrong
that jack of all trades but master of none.
Best of luck