Seth Godin said it so well in his post titled:  Without a sail.

" A sailboat without a sail might float. For a long time, in fact. But without a sail, it can't go anywhere, can't fulfill its function. Floating is insufficient. "

I have seen people float around for a lifetime, a whole career. With no direction, no purpose, at the mercy of circumstances. Floating is not only insufficient, it’s also very unsatisfying.