When we lose one we love, our bitterest tears are called forth by the memory of hours when we loved not enough.

Niemand is waarlijk mijn vriend, voordat we geleerd hebben in elkanders tegenwoordigheid te zwijgen.

(there is) no other means of escaping from one’s consciousness than to deny it, to look upon it as an organic disease of the terrestrial intelligence – a disease which we must endeavor to cure...

Our reason may prove what it will: our reason is only a feeble ray that has issued from Nature.

If the bee disappeared off the face of the earth, man would only have four years left to live.