You speak of doing good to the world. Is the world such a small thing? And who are you, pray, to do good to the world? First realise God, see Him by means of spiritual discipline. If He imparts power you can do good to others; otherwise not.
RamakrishnaDwell, O mind, within yourself; Enter no other's home. If you but seek there, you will find All you are searching for. God, the true Philosopher's Stone, Who answers every prayer, Lies hidden deep within your heart, The richest gem of all. How many pearls and precious stones Are scattered all about The outer court that lies before The chamber of your heart!
Ramakrishna