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.
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.
A devotee who can call on God while living a householder's life is a hero indeed. God thinks: 'He is blessed indeed who prays to me in the midst of his worldly duties. He is trying to find me, overcoming a great obstacle -- pushing away, as it were, a huge block of stone weighing a ton. Such a man is a real hero.
God laughs on two occasions. He laughs when the physician says to the patient's mother, 'Don't be afraid, mother; I shall certainly cure your boy.' God laughs, saying to Himself, 'I am going to take his life, and this man says he will save it!' The physician thinks he is the master, forgetting that God is the Master. God laughs again when two brothers divide their land with a string, saying to each other, 'This side is mine and that side is yours.' He laughs and says to Himself, 'The whole universe belongs to Me, but they say they own this portion or that portion.'
Men are like pillow-cases. The colour of one may be red, that of another blue, and that of the third black; but all contain the same cotton within. So it is with man; one is beautiful, another is ugly, a third holy, and a fourth wicked; but the Divine Being dwells in them all.
The young bamboo can be easily bent, but the full grown bamboo breaks when it is bent with force. It is easy to bend the young heart towards God, but the untrained heart of the old escapes the hold whenever it is so drawn.
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 you keep your heart immersed always in the depth of that holy love, your heart is sure to remain ever full to overflowing with the Divine fervour of sacred love.