Plato has dramatic strength ... but is quite unaware of the strength of the argument against his position ... and allows himself to be grossly unfair in arguing against it.

Do not feel certain of anything.

Only mathematics and mathematical logic can say as little as the physicist means to say.

The . . . increase in the power of officials is a constant source of irritation to everybody else.

He will see himself and life and the world as truly as our human limitations will permit; realizing the brevity and minuteness of human life, he will realize also that in individual minds is concentrated whatever of value the known universe contains. And he will see that the man whose mind mirrors the world becomes in a sense as great as the world. In emancipation from the fears that beset the slave of circumstance he will experience a profound joy, and through all the vicissitudes of his outward life he will remain in the depths of his being a happy man.

In attempting to understand the elements out of which mental phenomena are compounded, it is of the greatest importance to remember that from the protozoa to man there is nowhere a very wide gap either in structure or in behaviour. From this fact it is a highly probable inference that there is also nowhere a very wide mental gap.

Ideas and principles that do harm are as a rule, though not always, cloaks for evil passions.