Public speaking.   That is something I'm pretty sure I would not have had an opportunity to develop if I'd not been a jw.  I never got to the point where I like it (not by a long shot) but I did overcome my fears enough that I was able to have a part at an assembly.

"The best time to plant a tree was 20 years ago; the second best time is now"
-old Chinese proverb

"Unthinking respect for authority is the greatest enemy of the truth"
-Albert Einstein

“Joy is what happens to us when we allow ourselves to recognize how good things really are.” ― Marianne Williamson