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The constant effort towards population, which is found even in the most vicious societies, increases the number of people before the means of subsistence are increased.

With the rather stable ratio of labor force to total population, a high rate of increase in per capita product means a high rate of increase in product per worker; and, with average hours of work declining, it means still higher growth rates in product per man-hour.

The power of population is indefinitely greater than the power in the earth to produce subsistence for man.

For a man to achieve all that is demanded of him he must regard himself as greater than he is.

The man who comes up with a means for doing or producing almost anything better, faster or more economically has his future and his fortune at his fingertips.

There is no man living that can not do more than he thinks he can.

The quantity of a man's wealth will not last long if his generous nature is not balanced with the size of his property.

Increased means and increased leisure are the two civilizers of man.

Man has a limited biological capacity for change. When this capacity is overwhelmed, the capacity is in future shock.

A man is insensible to the relish of prosperity until he has tasted adversity.