In every department of physical science there is only so much science, properly so-called, as there is mathematics.

The only thing permanent is change.

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

By a lie a man throws away and, as it were, annihilates his dignity as a man. A man who himself does not believe what he tells another ... has even less worth than if he were a mere thing. ... makes himself a mere deceptive appearance of man, not man himself.

[Aristotle formal logic thus far (1787)] has not been able to advance a single step, and hence is to all appearances closed and completed.

All thought must, directly or indirectly, by way of certain characters, relate ultimately to intuitions, and therefore, with us, to sensibility, because in no other way can an object be given to us.

The existence of the Bible is the greatest blessing which humanity ever experienced.