He turns not back who is bound to a star.
Fire destroys falsehood, that is sophistry, and restores truth, driving out darkness.
First study the science, and then practice the art which is born of that science.
Blinding ignorance does mislead us. O! Wretched mortals, open your eyes!
Of the four elements water is the second in weight and the second in respect of mobility. It is never at rest until it unites with the sea.
Ask counsel of him who rules himself well.