I'm possible

It always seems impossible until it is done.
~ Nelson Mandela

Things are only impossible until they're not.
~ Jean-Luc Picard, character in STAR TREK: The Next Generation

People say nothing is impossible, but I do nothing every day.

~ A. A. Milne (Winnie-The-Pooh)

Start by doing what's necessary;
then do what's possible;
and suddenly you are doing the impossible. 

~ St. Francis of Assisi