Sometimes I think that my main motivation for practice is fear. Is this also alright?

Lama Ole’s answer:

In your case, I would simply think, “OK, the fear is my horse!” As soon as fear comes up, you think, “Today my fear is particularly strong, so I will meditate a great deal!” I would let it run and use it again and again as a motor for the meditation. One day you will look around and all the veils will be gone. So use it!

One can learn to use the energy of a disturbing feeling, be it fear, jealousy, or any other. If one learns to use this power, the possibilities are huge.