There is nothing good in worry so why worry? When one worries, one loses strength so anytime you entertain worry, know that you are putting your strength at stake.
Development is about transforming the lives of people, not just transforming economies. Operationalizing the economic indicators leads to economic development which reflects in the lives of people.
Have some knowledge in natural sciences! As lights of the world, we need to have some knowledge in natural sciences in order to dominate the universe well.