It is always advisable to perceive clearly our ignorance.

I ought, or I ought not, constitute the whole of morality.

Light will be thrown on the origin of man and his history.

To the mass of mankind religion of some kind is a necessity

Building a better mousetrap merely results in smarter mice.

Multiply, vary, let the strongest live and the weakest die.

Sympathy will have been increased through natural selection

The white men in our colonies are too frequently the savages

To the mass of mankind religion of some kind is a necessity.

It's not the strongest, but the most adaptable that survive.

I never gave up Christianity until I was forty years of age.

The school as a means of education to me was simply a blank.

A language, like a species, when extinct, never... reappears.

To get someone who is sensitive yet strong... Steve was that.

A man's friendships are one of the best measures of his worth.

If man can take care of man, nature can take care of the rest.

The only way you find what your limits are is by pushing them.

Mathematics seems to endow one with something like a new sense.

How sad would be November if we had no knowledge of the spring!

After losing Steve, it does kind of feel like I'm free-falling.

Ignorance more frequently begets confidence than does knowledge.

Blushing is the most peculiar and most human of all expressions.

I have since wandered among men of many races and many religions.

Much love much trial, but what an utter desert is life without love.

The love for all living creatures is the most noble attribute of man.

Wherever the European has trod, death seems to pursue the aboriginal.

You completely rediscovered & relived everything to do with wildlife.

An agnostic would be the more correct description of my state of mind.

I agree with Agassiz that dogs possess something very like conscience.

Man tends to increase at a greater rate than his means of subsistence.

We will now discuss in a little more detail the Struggle for Existence.

He who understands baboon would do more towards metaphysics than Locke.

I am dying by inches, from not having any body to talk to about insects.

Those who write as they speak, even though they speak well, write badly.

There never has been before and never will be again another Steve Irwin.

...for the shield may be as important for victory, as the sword or spear.

The season of love is that of battle. The roots of these fights run deep.

Disbelief crept over me at a very slow rate, but at last it was complete.

For the mind disturbed, the still beauty of dawn is nature's finest balm.

Noise is evolving not only the endurers of noise but the needers of noise.

You can't just go and collect animals from the wild. It's totally illegal.

For me, it was two years before I fed a big croc when I came to Australia.

The very essence of instinct is that it's followed independently of reason.

The Times is getting more detestable (but that is too weak word) than ever.

The world's favorite season is the spring. All things seem possible in May.

Man thinks, and at once becomes the master of the beings that do not think.

Nothing exists for itself alone, but only in relation to other forms of life

Animals, whom we have made our slaves, we do not like to consider our equal.

In nature, there is less death and destruction than death and transmutation.

The cells are thus the stomachs of which the plant has millions like mouths.

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