You must always remember that the one central ideal of Vedanta is this oneness.
There are no two in anything, no two lives, nor even two different kinds of life for the two worlds. … …
Everything is that One, the difference is in degree and not in kind.
The Vedanta entirely denies such ideas as that animals are separate from men, and that they were made and created by God to be used for our food. …
… If man's life is immortal, so also is the animal's. The difference is only in degree and not in kind. The amoeba and I are the same, the difference is only in degree; and from the standpoint of the highest life, all these differences vanish.
- Swami Vivekananda,
Practical Vedanta I,