Hijikata Toushirou

There is no need for any proof. There is no need to create any. We just have to live every second to the fullest, and the traces of the path we lived will burn into the ground. That will serve as proof of our existence.

If you run into a wall and pretend it doesn’t exist, you’ll never make progress. The wall will never change, so you’re the one who has to change. Now you're just making excuses to the wall.