Be content with the job you have, your car, family, house, ... and you will find that your heart will be at peace
This does not mean you should not do your best to improve, but means that after doing your best, be pleased with the outcome
This feeling of content and gratitude leads to peace of mind, as Prophet Muhammad, peace be upon him, said: (Be contented with what Allah has apportioned for you and you will be the richest of people).
He also said: (Richesness is the richesness of the soul)
