savant does not rest content with his own explanation:
"Indra est peut-etre, de tous les dieux vediques, celui qui resiste le
plus longtemps a un genre d'analyse qui, applique a la plupart des
autres, les resout plus ou moins vite en des personnifications des
elements, soit des phenomenes naturels, soit du culte" (ibid. p. 167).

Dyaus' son, Indra, who rides upon the storm and hurls the lightnings
with his hands; who 'crashes down from heaven' and 'destroys the
strongholds' of heaven and earth; whose greatness 'fills heaven and
earth'; whose 'steeds are of red and gold'; who 'speaks in thunder,'
and 'is born of waters and cloud'; behind whom ride the storm-gods;
with whom Agni (fire) is inseparably connected; who 'frees the waters
of heaven from the demon,' and 'gives rain-blessings and wealth' to
man--such a god, granted the necessity of a naturalistic
interpretation, may well be thought to have been lightning itself
originally, which the hymns now represent the god as carrying. But in
identifying Indra with the sun there is more difficulty. In none of
the early hymns is this suggested, and the texts on which Bergaigne
relies besides being late are not always conclusive. "Indra clothes
himself with the glory of the sun"; he "sees with the eye of the
sun"--such texts prove little when one remembers that the sun is the
eye of all the gods, and that to clothe ones' self with solar glory is
far from being one with the sun. In one other, albeit a late verse,
the expression 'Indra, a sun,' is used; and, relying on such texts,
Bergaigne claims that Indra is the sun. But it is evident that this is
but one of many passages where Indra by implication is compared to the
sun; and comparisons do not indicate allotropy. So, in ii. II. 20,
which Bergaigne gives as a parallel, the words say expressly "Indra
[did so and so] _like a sun_."[4] To rest a building so important on a
basis so frail is fortunately rare with Bergaigne. It happens here
because he is arguing from the assumption that Indra primitively was a
general luminary. Hence, instead of building up Indra from early
texts, he claims a few late phrases as precious confirmation of his
theory.[5] What was Indra may be seen by comparing a few citations
such as might easily be amplified from every book in the Rig Veda.

According to the varying fancies of the poets, Indra is armed with
stones, clubs, arrows, or the thunderbolt (made for him by the
artificer, Tvashtar), of brass