Experience without theory is blind, but theory without experience is mere intellectual play..

A single line in the Bible has consoled me more than all the books I ever read besides..

Thoughts without content are empty, intuitions without concepts are blind... The understanding can intuit nothing, the senses can think nothing. Only….

Man desired concord; but nature knows better what is good for his species; she desires discord. Man wants to live easy and content; but nature compe….

The ideal of the supreme being is nothing but a regulative principle of reason which directs us to look upon all connection in the world as if it ori….

For peace to reign on Earth, humans must evolve into new beings who have learned to see the whole first..

Every man is to be respected as an absolute end in himself; and it is a crime against the dignity that belongs to him as a human being, to use him as….

It is often necessary to make a decision on the basis of knowledge sufficient for action but insufficient to satisfy the intellect..

Always regard every man as an end in himself, and never use him merely as a means to your ends [i.e., respect that each person has a life and purpose….

Of all the arts poetry (which owes its origin almost entirely to genius and will least be guided by precept or example) maintains the first rank..

...as soon as we examine suicide from the standpoint of religion we immediately see it in its true light. We have been placed in this world under cer….

Men will not understand ... that when they fulfil their duties to men, they fulfil thereby God's commandments; that they are consequently always in t….

The universal and lasting establishment of peace constitutes not merely a part, but the whole final purpose and end of the science of right as viewed….

In the kingdom of ends everything has either a price or a dignity. Whatever has a price can be replaced by something else as its equivalent; on the o….

Even a man's exact imitation of the song of the nightingale displeases us when we discover that it is a mimicry, and not the nightingale..

All perception is colored by emotion..

All human knowledge begins with intuitions, proceeds from thence to concepts, and ends with ideas..

Thinking in pictures precedes thinking in words..

Man must be disciplined, for he is by nature raw and wild..

Reason should investigate its own parameters before declaring its omniscience..

The hand is the visible part of the brain..