You'll Find It When You Aren't Looking

Single and married people have always said something like, "You'll find it when you aren't looking."  Is there any truth to it?  I go from looking to not looking, back to looking many many times over the course of a year.

I don't think I've been truly looking for years.  I gave up because I didn't find what I wanted to find and/or I really like being single.  Even though I gave up, I continued going on dates because I wanted to make sure I didn't miss out on the possibility that he could be the right guy.  There are so many other things I'd rather be doing than going on lukewarm dates.