"Bhagavān" is a word used to refer to the personal aspect of God in general; it is not specific to a particular deity. Bhagavān transcends gender, yet can be looked upon as both father and mother, child, or sweetheart.[2] Most Hindus, in their daily devotional practices, worship some form of this personal aspect of God, although they believe in the more abstract concept of Brahman as well. This may mean worshiping God through an image or a picture, or simply thinking of God as a personal being.
"Ishvara" is a name or title used to emphasize God's role and function as controller of the universe. When Hindus refer to God as Ishvara, they are emphasizing a monistic idea of God as a principle of the universe, rather than a person.
Different names and, frequently, different images of God will be used, depending on which aspect of Bhagavā is being discussed. For instance, when God is talked about in the aspect as the creator, God is called Brahmā.[3] If one is emphasizing God's capacity as preserver of the world, the name Vishnu is used. When referred to in the capacity as destroyer of the world, God is called Shiva. Many of these individual aspects of God also have other names and images. For example, Krishna and Rama are considered forms of Vishnu. All the various deities and images one finds in Hinduism are considered manifestations of the same God, called Bhagavān in the personal aspect and Brahman when referred to as an abstract concept.