Master of Nothing...
This prompt reminds me of the old saying, "Jack of all trade and master of none".
When a person is not consistent or specialized in a particular field or position, he cannot gain mastery of this field. He might be in this sector for a while, a long time even and yet he is not perfect in his duties.
To gain mastery or to be a master of a certain sector, one needs to pay attention and focus on what he wants to be a master of instead of dividing his attention on different things. Once he is not focused on something, he cannot be a master of any but a master of some.
So, don't be a master of nothing. Try to pay attention and focus on something tangible to gain mastery. This does not stop you from gaining extra knowledge in other fields but priority really matters here.
Thank you for your time...
That's a good point.