Both of these branches of evolutionary science, are, in my opinion, in the closest causal connection; this arises from the reciprocal action of the laws of heredity and adaptation.

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.

Rule No. i is don't sweat the small stuff. Rule No. 2 is it's all small stuff.

Family and friends and faith are the most important things in your life and you should be building friendships.

You cannot build character and courage by taking away people's initiative and independence. You cannot help people permanently by doing for them what they could and should do for themselves.

The reading of literature opens our eyes, offering us new perspectives on things that we can evaluate and adopt.

I'll go with the guy with one house. The guy with one house is scared about losing his house.

I know that I cannot control anyone else's actions but my own, and how I choose to react to situations.

You cannot solve a problem unless you diagnose the problem.

It may be healthier to eat beer and franks with cheer and thanks, than to eat sprouts and bread with doubts and dread.

There are two kinds of power. One is power over, which is always destructive, and the other is power from within, which is a transcendent and creative power.

Metaphor is the lifeblood of all art.