Our fears don't stop death, they stop life.
Look around and find something for which to be grateful.
Sometimes, you don't have to win, you cannot win. but that has nothing to do with losing.
Be positive and the challenge will be easier.
If you are not comortable to deal with an opponent 50 lbs heavier than you, there is something wrong with your Jiu Jitsu.
A strong body is a good asset. A strong mind is a very good asset.