Take the first step in faith. You don't have to see the whole staircase, just take the first step.
“One may know how to gain a victory, and know not how to use it.”
“What that book does for me is give me the tools in the same way that I had the tools when I learned the regular scales or the alphabet. If you give me the tools, the syntax, and the grammar, it still doesn't tell me how to write Ulysses.”