(Prabhupada's lecture - Śrīmad-Bhāgavatam 2.2.5 - Los Angeles, December 2, 1968)
So that is the highest gift to the human society. There are so many welfare activities in the human society. People open hospitals, schools, colleges, charitable institution. They are nice. But the best contribution to the human society is to revive his lost relationship with God. Just like a rich man's son. Someway or other he has left his father's home and he's loitering here and there. Somebody finds him: "Oh, you are Mr. such and such. You are the son of such and such gentleman. He's very rich man. Why you are suffering? Come, come with me. I shall take to your father." So this is one kind of welfare activity. And another welfare activity, the same person who is loitering in the street, somebody says, "Oh, you are hungry. All right, come on. I shall give you some bread." That is also welfare activity, but this welfare activity, to get the lost son to his father, rich father, not ordinary father, that is the best service. Similarly, all living entities... As Kṛṣṇa claims in the Bhagavad-gītā... Kṛṣṇa claims,
sarva-yoniṣu kaunteya
mūrtayaḥ sambhavanti yāḥ
tāsāṁ brahma mahad yonir
ahaṁ bīja-pradaḥ pitā
[Bg. 14.4]
In many places in the Bhagavad-gītā Kṛṣṇa claims all living entities as His sons, parts and parcels. Just like your children, they are part and parcel of your body. They are not different from you. The same blood is running in his body. Similarly, our constitutional position is that the same blood of God is running in our body. We are not different in that way from God.