Never think about what people are saying about you.
Never always thing that what you are doing for God is a waste of time.
People may think you don't know what you are doing but hold on to what is good that you are doing for he never disappoint those who loves him.
now that you have the time on earth why not give your time to christ use your body to do great things for christ , work for him , live for him and make him your first priority in your life.
People who totally gave their life in the bible were in all ratifications blessed according to their works.