Nothing in this world evolves out of the blue.Everything one does is motivated by something.It could be a feeling so strong that nobody can stop.
In whatsoever estate we are in life,there is this innate predisposition that sets us to do something and that's what leads us to the promised land of success.Passion has led us on many times in our lives to do something so great but sometimes we fail to realize it is passion that led us there.
We as well fail to realize our passions sometimes.We rather follow the things other people follow because we think that's the best.
Passion is intrinsic,you must be internally motivated to do what your instincts tell you,if only that passion wont affect or set others on a wrong path.