Wood feeds the fire which burns it.

In time and with water, everything changes.

Those who are enamoured of practice without science are like a pilot who goes into a ship without rudder or compass and never has any certainty of where he is going. Practice should always be based upon a sound knowledge of theory.

Happy will they be who lend ear to the words of the dead.

Poor is the pupil who does not surpass his master.

I have discovered that a screw-shaped device such as this, if it is well made from starched linen, will rise in the air if turned quickly.

He who does not oppose evil......commands it to be done.