Meditate upon the Knowledge and Bliss Eternal , and you will also have bliss. The Bliss indeed is eternal, only it is covered and obscured by ignorance. The less your attachment is towards the senses, the more will be your love towards God .
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.
When the head of a goat is severed from its body, the trunk struggles for some time, still showing signs of life. Similarly, though ahamkara (egotism) is slain in the perfect man, yet enough of its vitality is left to make him carry on the functions of physical life; but it is not sufficient to bind him again into the world.
It's enough to have faith in one aspect of God. You have faith in God without form. That is very good. But never get into your head that your faith alone is true and every other is false. Know for certain that God without form is real and that God with form is also real. Then hold fast to whichever faith appeals to you.
As a boy holding to a post or a pillar whirls about it with headlong speed without any fear or falling, so perform your worldly duties, fixing your hold firmly upon God, and you will be free from danger.
When you meditate, go into the solitude of a forest, or a quiet corner, and enter into the chamber of your heart. And always keep your power of discrimination awake.
As the shell, the pith and the kernel of the fruit are all produced form one parent seed of the tree, so from the one Lord is produced the whole of creation, animate and inanimate, spiritual and material.
Take the case of the infinite ocean. There is no limit to its water. Suppose a pot is immersed in it: there is water both inside and outside the pot. The jnani sees that both inside and outside there is nothing but Paramatman. Then what is this pot? It is 'I-consciousness'. Because of the pot the water appears to be divided into two parts; because of the pot you seem to perceive an inside and an outside. One feels that way as long as this pot of 'I' exists. When the 'I' disappears, what is remains. That cannot be described in words.
God reveals Himself to a devotee who feels drawn to Him by the combined force of these three attractions: the attraction of worldly possessions for the worldly man, the child's attraction for its mother, and the husband's attraction for the chaste wife. If one feels drawn to Him by the combined force of these three attractions, then through it one can attain Him.