If justice perishes, human life on Earth has lost its meaning.

A science of all these possible kinds of space [the higher dimensional ones] would undoubtedly be the highest enterprise which a finite understanding could undertake in the field of geometry... If it is possible that there could be regions with other dimensions, it is very likely that God has somewhere brought them into being.

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

Two things fill the mind with ever new and increasing admiration and awe, the oftener and more steadily we reflect on them: the starry heavens above and the moral law within.

If education is to develop human nature so that it may attain the object of its being, it must involve the exercise of judgment.

A categorical imperative would be one which represented an action as objectively necessary in itself, without reference to any other purpose.

Maximum individuality within maximum community