Every step in the progress of this study has tended to obliterate the technical barriers by which logicians have sought to separate the inquiries relating to the several parts of man's nature.

No naturalist has devoted more painstaking attention to the structure of the barnacles than Mr. Darwin.

What is the worth of anything, But for the happiness 'twill bring?

The relationship between a Russian and a bottle of vodka is almost mystical.

But, as we have before been led to remark, most of Mr. Darwin's statements elude, by their vagueness and incompleteness, the test of Natural History facts.

That the variability of an organism to a certain extent is a constant and certain condition of life we admit, otherwise there would be no distinguishable individuals of a species.

Manifold subsequent experience has led to a truer appreciation and a more moderate estimate of the importance of the dependence of one living being upon another.

Cuvier had preceded Lamarck in specifying the kinds and degrees of variation, which his own observations and critical judgment of the reports of others led him to admit.

Homologue. The same organ in different animals under every variety of form and function.

Analogue. A part or organ in one animal which has the same function as another part or organ in a different animal.

Mr. Darwin refers to the multitude of the individual of every species, which, from one cause or another, perish either before, or soon after attaining maturity.

All the so-called "secrets of success" will not work unless you do.

Teach children the value of work and to work hard at everything they do. The virtue of compassion and value of appreciation of the hard work of others too.

A medical profession founded on callousness to the pain of the other animals may eventually destroy its own sensibility to the pain of humans.

I want to save lives, including my own, but Cambodians believe we just rent this body. It is just a house for the spirit, and if the house is full of termites, it is time to leave.

I want to make everybody laugh.

Facebook is that successful guy you're supposed to want to date, but you can't keep your mind off the beautiful freak in the corner. Twitter is my freak.

I look back at my twenties and see that I was much less confident.

The great virtue of those who seek the spiritual path is courage.

Amongst the rock one cannot stop or think