One cannot attain divine knowledge till one gets rid of pride. Water does not stay on the top of a mound; but into low land it flows in torrents from all sides.
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.
If a white cloth is stained even with a small spot, the stain appears very ugly indeed. So the smallest fault of a holy man becomes painfully prominent.
These people are like ... a frog living in a well, who has never seen the outside world. He knows only his well, so he will not believe that there is such a thing as the world. Likewise, people talk so much about the world because they have not known the joy of God.