How can we find peace in Islam? The greatest form of contentment is internal peace. It is not material things, external circumstances, or the assuaging of our egos that bring us happiness. It is the internal state of contentment that we cultivate within ourselves through God.
If you can train yourself to appreciate the large and the small, you will find peace in all situations. If you can find happiness in everything you will even be happy if you have just a simple good night sleep.
When we make our life goal to gain material things, we can never find inner peace.