You are not very satisfied with your current life. Why?
First of all, because your knowledge and experience have improved, you have put forward higher requirements for life. Secondly, your current state of life is caused by your previous thinking and behavior.
Uncle Bacon has a famous book "The Theory of Habits". There is a famous saying in it. I give it to you here: Thoughts determine behavior; behavior determines habits; habits determine character; character determines destiny!
So what your leader said to you and what Uncle Bacon said actually mean the same thing~!