Natural science physics contains in itself synthetical judgments a priori, as principles. ... Space then is a necessary representation a priori, which serves for the foundation of all external intuitions.

It is never too late to become reasonable and wise.

Freedom in the practical sense is the independence of the power of choice from necessitation by impulses of sensibility

Great minds think for themselves.

Through laziness and cowardice a large part of mankind, even after nature has freed them from alien guidance, gladly remain immature. It is because of laziness and cowardice that it is so easy for others to usurp the role of guardians. It is so comfortable to be a minor!

Art does not want the representation of a beautiful thing, but the representation of something beautiful.

But although all our knowledge begins with experience, it does not follow that it arises from experience.