Too much study of the scriptures does more harm than good. The important thing is to know the essence of the scriptures. After that, what is the need of books? One should learn the essence and then dive deep in order to realize God.
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.
Those who wish to attain God and progress in religious devotion, should particularly guard themselves against the snares of lust and wealth. Otherwise they can never attain perfection.
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.
The way of love is as true as the way of knowledge. All paths ultimately lead to the same Truth. But as long as God keeps the feeling of ego in us, it is easier to follow the path of love.
Travel in all the four quarters of the earth, you will find nothing (no true religion) anywhere. Whatever there is, is only here (i .e . in one 's own heart.)
The waves belong to the Ganges, not the Ganges to the waves. A man cannot realize God unless he gets rid of all such egotistic ideas as "I am such an important man" or "I am so and so". Level the mound of "I" to the ground by dissolving it with tears of devotion.
If you desire to be pure, have firm faith, and slowly go on with your devotional practices without wasting your energy in useless scriptural discussions and arguments. Your little brain will otherwise be muddled.
Brahman is beyond mind and speech, beyond concentration and meditation, beyond the knower, the known and knowledge, beyond even the conception of the real and unreal. In short, It is beyond all relativity.