It cannot be done.

Indra is neither sun, lightning, nor storm; Agni is neither hearth-fire nor celestial fire; Soma is neither planet nor moon.
Each is the transient manifestation of a spirituality lying behind and extending beyond this manifestation.

Here alone is the latch-key of the newer, more popular religion.

Not merely because Indra was a 'warrior god,' but because Indra and Fire were one; because of the mystery, not because of the appearance, was he made great at the hands of the priests.

It is true, as has been said above, that the idol of the warriors was magnified because he was such; but the true cause of the greatness ascribed to him in the hymns lay in the secret of his nature, as it was lauded by the priest, not in his form, as it was seen by the multitude.