There is no doubt that the course and character of the feared 'European war'... will become the first world war in the full sense of the word.

Nothing is constant but change! All existence is a perpetual flux of "being and becoming!" That is the broad lesson of the evolution of the world.

Man is not above nature, but in nature.

Mental differences between the lowest men and the animals are less than those between the lowest and the highest man.

By ecology we understand the total science of the connections of the organism to the surrounding external world.

Politics is applied biology.

Civilization and the life of nations are governed by the same laws as prevail throughout nature and organic life.

Ontogeny re-capitulates phylogeny.

The real cause of personal existence is not the favor of the Almighty, but the sexual love of one's earthly parents.

As our mother-earth is a mere speck in the sunbeam in the illimitable universe, so man himself is but a tiny grain of protoplasm in the perishable framework of organic nature.

The cell never acts; it reacts.

I understand why she did all those things, but that doesn't mean we aren't still broken.

We may think there is willpower involved, but more likely... change is due to want power. Wanting the new addiction more than the old one. Wanting the new me in preference to the person I am now.

And when someone else speaks your name you feel pleased. You feel wanted. You feel there. Alive. Even if they're saying your name with dislike, at least you know you're you, that you exist.

Death comes along like a gas bill one can't pay.

Every hero is a Samson. The strong man succumbs to the intrigues of the weak and the many; and if in the end he loses all patience he crushes both them and himself.

What world lies beyond that stormy sea I do not know, but every ocean has a distant shore, and I shall reach it.

It is a company's customers who effectively control what it can and cannot do.

The actions of a human being, even of fifteen months of age, may not be without significance to a sympathetic eye.

You can't tackle climate change until you tackle poverty.

If I had to single out one element in my life that has made a difference for me, it would be a passion to compete.