Becoming a Jedi involves a level of self-conflict.
It is natural for humans (or whatever species you are) to experience emotion. Yet, for a true Jedi, there is no emotion. There is only peace. You are supposed to let go of these feelings that seem to true to you. Yet, if you do as such, are you really living? What is the point?
Imagine that the Force is like an ocean. You step into it, and immerse yourself in it's unimaginable power. One wave can crush you, and that is but one wave in the gigantic ocean. Yet, you as a Jedi place your hand in the path of said wave and redirect it. A Jedi moves and reshapes the Force to achieve a desired affect.
Judging from the original trilogy, it would seem Jedi Masters (Obi-Wan in his old age and Yoda) prefer meditation, and simple lives over dipping into that vast power. Surely, they could become gods with their mastery of the Force. Instead, they choose to find their place within the Force and avoid making waves themselves.
There is self-conflict in deciding to use the powers in what you believe are honorable efforts, or to see balance and harmony. The Force also guides you. The Force can give you hints of what is to come, as it seeks to create balance. Should you question these visions and seek to change Fate? Should you let the Force make decisions for you?
All of these things are part of a quest of self-mastery.