It is proved...that things cannot be other than they are, for since everything was made for a purpose, it follows that everything is made for the best purpose.
VoltaireDoctors put drugs of which they know little into bodies of which they know less for diseases of which they know nothing at all.
VoltaireWhen we cannot use the compass of mathematics or the torch of experience...it is certain we cannot take a single step forward.
VoltaireOur wretched species is so made that those who walk on the well-trodden path always throw stones at those who are showing a new road.
Voltaire