„Remember this, then, that this little compound, thyself, must either be dissolved, or they poor breath must be extinguished, or be removed and placed elsewhere.“

— Marcus Aurelius
„Whatever happens, the flame of the French resistance must not be extinguished and will not be extinguished. Tomorrow, as today, I will speak on Radio London.“
— Charles de Gaulle
„The life we have on Earth must have spontaneously generated itself. It must therefore be possible for life to generate spontaneously elsewhere in the universe.“
— Stephen Hawking