It's not given to people to judge what's right or wrong. People have eternally been mistaken and will be mistaken, and in nothing more than in what they consider right and wrong.
It may be suggested by some books that it is not a sin to kill an animal, but it is written in our own hearts - more clearly than in any book - that we should take pity on animals in the same way as we do on humans.
The vegetarian movement ought to fill with gladness the souls of those who have at heart the realization of God's kingdom upon earth, not because vegetarianism itself is such an important step towards the realization of this kingdom (all real steps are equally important or unimportant), but because it serves as a criterion by which we know that the pursuit of moral perfection on the part of man is genuine and sincere.
I have discovered nothing. I have only found out what I knew. I understand the force that in the past gave me life, and now too gives me life. I have been set free from falsity, I have found the Master.