Life is doubt, and faith without doubt is nothing but death.
True science teaches, above all, to doubt and be ignorant.
Faith which does not doubt is dead faith.
Love is the child of illusion and the parent of disillusion.
Your neighbor's vision is as true for him as your own vision is true for you.
Science is the most intimate school of resignation and humility, for it teaches us to bow before the seemingly most insignificant of facts.