How to be Self-Motivated?

Can motivation be external? Or is motivation always from within?

The answer is that, one can derive motivation only by his own self.  No "one" can motivate us, all that one can do is create an environment that is conducive of motivation, and to do what we want to do. 

If "you" are self-motivated then thank everyone  for creating environment that has made you be.

And on the other side, if you want to motivate someone, then the best you can do is to create an environment such that the "someone" is able to motivate himself.