Existence is One and Only One.

इन्द्रं॑ मि॒त्रं वरु॑णम॒ग्निमा॑हु॒रथो॑ दि॒व्यः स सु॑प॒र्णो ग॒रुत्मा॑न् ।
एकं॒ सद्विप्रा॑ बहु॒धा व॑दन्त्य॒ग्निं य॒मं मा॑त॒रिश्वा॑नमाहुः ॥४६॥

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They call him Indra, Mitra, Varuṇa, Agni; yea, he is heavenly Garuḍa, who has beautiful wings. That which is One, the sages speak of as Multifarious; they call him Agni, Yama, Mātariśvan.
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Existence is One and Only One; One is known by many names; One is always the same.
~ Wald