Quotes from authors born in 1646
I hold that the mark of a genuine idea is that its possibility can be proved, either a priori by conceiving its cause or reason, or a posteriori when experience teaches us that it is in fact in nature.
Gottfried Leibniz
I do not conceive of any reality at all as without genuine unity.
Gottfried Leibniz
Music is the pleasure the human mind experiences from counting without being aware that it is counting.
Gottfried Leibniz
It follows from what we have just said, that the natural changes of monads come from an internal principle, since an external cause would be unable to influence their inner being.
Gottfried Leibniz
There are also two kinds of truths: truth of reasoning and truths of fact. Truths of reasoning are necessary and their opposite is impossible; those of fact are contingent and their opposite is possible.
Gottfried Leibniz
Tim McGraw 
Alison Moyet 
Jane Birkin 
Matthew Lawrence 
Greta Garbo 
Jello Biafra 
Ed Sullivan 
Courteney Cox Authors born in 1646