According to our Vedic line of thought, anyone who does not accept the Vedic way of life, he is called atheist. Therefore Buddhist, according to Vedāntist, Buddhist are called atheist. Actually Buddha philosophy does not accept God, neither soul. They simply philosophize on the material elements, and they want to finish the material exis . . . dismantle the material elements. Nirvāṇa. So Caitanya Mahāprabhu has remarked that the Buddhists are honest. They frankly say that "We don't accept your Vedas." But the Śaṅkarites, they are cheaters, because they are accepting Vedas, but on the basis of Buddha philosophy. That is cheating.
So there are many conception of God. But here is a conception of God: to accept God as son. That is only in Vaiṣṇava philosophy. Because we are eternal servants of God. That is our philosophy. Jīvera svarūpa haya nitya-kṛṣṇa-dāsa (Cc. Madhya 20.108-109). The living entity, his real constitutional position is to serve God. We have several times explained this fact, that the part and parcel of God must be engaged in the service of the Lord.
Just like this finger is part and parcel of my body. Its duty is to serve the body. It has no other duty. The finger cannot go elsewhere and serve something else; it must serve my body. Therefore, it is part and parcel. Similarly, if I am part and parcel of God, then my only duty is to serve God. This is Vaiṣṇava philosophy. So therefore, in Vaiṣṇava philosophy, everything in relationship with God is service.