If size mattered, the elephant would be king of the jungle.
If you are ready to die, then you are ready to live.
In life, when presented with any situation, breathe, take your time, focus and then decide what to do.
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.
If you do not speak up when it matters, when would it matter that you speak? The opposite of courage is conformity. Even a dead fish can go with the flow.