Marc Andreessen

Set your sights high, the higher the better. Expect the most wonderful things to happen, not in the future but right now. Realize that nothing is too good. Allow absolutely nothing to hamper you or hold you up in any way.

Baseball calls it a curve ball for a reason: you just don't know where some pitches will land. Your ace could get injured. Your golden glover could err. Your team could sit through a rain delay. Your manager could get ejected. Your bench must be broad and deep enough to overcome.