“I know what it is to be in need, and I know what it is to have plenty. I have learned the secret of being content in any and every situation, whether well fed or hungry, whether living in plenty or in want. I can do all this through him who gives me strength.” (Philippians 4:12-13 NIV)
Being content with where you are and what you have, has nothing to do with where you are and what you have.
It is knowing that God is working on you, in you and through you as you surrender to Him in it.
It is knowing that all things are not good but that God will use all things for your good.
It is knowing that He will not leave you or forsake you.
It is knowing Him.