Human beings are the only creatures on the planet that tell time and think they have to earn a living.

Only human, after all.

Children are the only form of immortality that we can be sure of.

Humans are the only animals clever enough to outsmart themselves out of the gene pool.

We are the only animals that tell stories to understand the world we live in.

Man is the only creature who refuses to be what he is.

I believe, however, that humans are the only animals that we know who invents tools for working together - and they have done that as long as we have considered them human.

Hey — guess what: You're the only creature with free will. How does that make you feel?

We are the one creature to whom natural selection has bequeathed a brain complex enough to comprehend the laws that govern the universe. And we should be proud that we are the only species that has figured out how we came to be.

Theological anthropology is a lot simpler when humans are the only ones with souls.

There will be no humans elsewhere. Only here. Only on this small planet. We are a rare as well as an endangered species. Every one of us is, in the cosmic perspective, precious. If a human disagrees with you, let him live. In a hundred billion galaxies, you will not find another.

Only human beings and rabid animals turn on their own kind,

Man, who is the only creature on earth which God willed for itself, can fully find himself only through a sincere gift of himself.

Every creature on earth returns to home. It is ironic that we have made wildlife refuges for ibis, pelican, egret, wolf, crane, deer, mouse, moose, and bear, but not for ourselves in the places we live day after day. We understand that the loss of habitat is the most disastrous event that can occur to a free creauture.
We fervently point out how other creatures' natural territories have become surrounded by cities, ranches, highways, noise, and other dissonance, as though we are not affected also.
We know that for creatures to live on, they must at least from time to time have a home place, a place where they feel both protected and free