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.
A spiritual teaching is a finger pointing toward Reality; it is not Reality itself. To be in a true and mature relationship with a spiritual teaching requires you to apply it, not simply believe in it.
It is a great art to have an abundance of knowledge and experience - to know the richness of life, the beauty of existence, the struggles, the miseries, the laughter, the tears - and yet keep your mind very simple; and you can have a simple mind only when you know how to love.
The dangers is that every religion, including the Catholic one, says "I have the ultimate truth." Then you start to rely on the priest, the mullah, the rabbi, or whoever, to be responsible for your acts. In fact, you are the only one who is responsible.
Whenever we encounter the Infinite in man, however imperfectly understood, we treat it with respect. Whether in the synagogue, the mosque, the pagoda, or the wigwam, there is a hideous aspect which we execrate and a sublime aspect which we venerate. So great a subject for spiritual contemplation, such measureless dreaming - the echo of God on the human wall!