There are no boundaries as to the energy that may serve as the focal point of your puja.

There are no boundaries as to the energy that may serve as the focal point of your puja. You need only choose a spiritual guide to connect with and an object to represent them. Preparing for the puja ritual, you will need an altar and offerings. Meditation, chanting, the reading of sacred texts, offerings of food and water, and cleansing are part of the ritual. Just as you adorn your body your spiritual body also accepts the fragrances of incense, flowers. An altar created with the deity and its sacred geometry, the yantra, and mala beads that are used in chanting of mantras provides focus for the energy of the divine and a seat of our consciousness. Center yourself and release any stress you may feel, breathe in through your right nostril and out through the left. Repeat with the left nostril. Release all negativity and open your heart to the energies of the divine. Ringing of a bell and inviting the energies, chanting the mantras and the cleansing and dressing of the deity, we are creating a connection with the cosmic divinity
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The Brahman

“When a person is about to die, he can no longer see and the god of sight deserts the body. The dying person ceases to see, inhale, talk, hear, think, touch or know. The outlet from the heart lights up and the minute being ascends upwards in a blaze of light. When the Brahman leaves the body, the life force also leaves. And subsequently, the atman enters a new body, depending on the action that was performed in the earlier life. A leech uses a blade of grass to move to another blade of grass. Like that, the atman uses one physical body to move to another physical body. A jeweler uses a little bit of gold to fashion out better and better ornaments. Like that, the atman uses this physical body to attain better and better worlds and better and better lives.”

"Upanishads"