There are more things in
heaven and earth than are dreamt
in philosophy.
Shakespeare.
Thomas Aquinas'
first cause argument for God
contradicts itself.
Jean-Paul Sartre once wrote
'Existentialism is
a humanism'.
Pascal's wager is
a disgraceful reason for
believing in God.
I like the last three. I don't like the first, because it was quoted ad nauseam by one BashfulAnthony, most likely because it was the only Shakespeare quote he knew, and thought it was a sufficient put-down for atheists.
Sartre also thought existentialism could be married to marxism. Not a union made in heaven - in fact, cobblers.