The rishis of old attained the Knowledge of Brahman. One cannot have this so long as there is the slightest trace of worldliness. How hard the rishis laboured ! Early in the morning they would go away from the hermitage, and would spend the whole day in solitude, meditating on Brahman. At night they would return to the hermitage and eat a little fruit or roots. They kept their mind aloof from the objects of sight, hearing, touch, and other things of a worldly nature. Only thus did they realize Brahman as their own inner conciousness.
More are the names of God and infinite are the forms through which He may be approached. In whatever name and form you worship Him, through them you will realise Him.
A man develops a subtle power as a result of the strict observance of celibacy for twelve years. Then he can understand and grasp very subtle things which otherwise elude his intellect. Through that understanding the aspirant can have direct vision of God. That pure understanding alone enables him to realize Truth.
Dwell, 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!
How long do small girls play with their dolls? As long as they are not married and do not live with their husbands. After marriage they put the dolls away in a box. What further need is there of worshipping the image after the vision of God?
When an unbaked pot is broken, the potter can use the mud to make a new one; but when a baked one is broken, he cannot do the same any longer. So when a person dies in a state of ignorance, he is born again; but when he becomes well baked in the fire of true knowledge and dies a perfect man, he is not born again.
Those whose spiritual awareness has been awakened never make a false move. They don't have to avoid evil. They are so replete with love that whatever they do is a good action. They are fully conscious that they are not the doer of their actions, but only servants of God.
One man may read the Bhagavata by the light of a lamp, and another may commit a forgery by that very light; but the lamp is unaffected. The sun sheds its light on the wicked as well as on the virtuous.
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.
With sincerity and earnestness one can realize God through all religions. The Vaishnavas will realize God, and so will the Saktas, the Vedantists, and the Brahmos. The Mussalmans and Christians will realize Him too. All will certainly realize God if they are earnest and sincere.