Mere goodness can achieve little against the power of nature.

Education is the art of making man ethical.

All that is real is reasonable, 

and all that is reasonable is real.

When liberty is mentioned, 

we must always be careful to observe 

whether it is not really the assertion of private interests 

which is thereby designated.

To him who looks upon the world rationally, 

the world in its turn presents a rational aspect. 

The relation is mutual.

Truth in philosophy means that concept and external reality correspond.