Thinking is easy, acting is difficult, and to put one's thoughts into action is the most difficult thing in the world.

Man believes himself always greater than he is, and is esteemed less than he is worth.

If the world does improve on the whole, yet youth must always begin anew, and go through the stages of culture from the beginning.

To know where a thing is we must have found it.

Where a man has a passion for meditating without the capacity of thinking, a particular idea fixes itself fast, and soon creates a mental disease.

Everything is simpler than one can imagine, and yet complicated and inter-twined beyond comprehension.

We can't form our children on our own concepts; we must take them and love them as God gives them to us.