> "...Bill Gates were college dropouts, but the market deemed them good."

Gates had excellent grades and was credited in an academic paper during his undergraduate years. Not exactly like the average dropout.

> "Now that I think of it, apparently Einstein was a mediocre student, but his contributions to science were his way out. "

That's a myth. Einstein got top grades in science and mathematics.

As for the original question, "If you wish to build a ship, do not divide the men into teams and send them to the forest to cut wood. Instead, teach them to long for the vast and endless sea.", incorrectly attributed to Antoine de Saint-Exupéry