Sed nescio quo modo nihil tam absurde dici potest quod non dicatur ab aliquo philosphorum. (There is nothing so absurd but some philosopher has said … - Cicero

There is nothing so absurd that some philosopher has not already said it.

Nothing is too absurd for some philosopher to have said it.

There is nothing so absurd that it has not been said by some philosopher.

Nihil tam absurde dici potest, quod non dicatur ab aliquo philosophorum.

There is no people so brutish or barbarous that they do not know that they must believe in a god, even if they do not know precisely what god they should worship.

Quo usque tandem abutere, Catalina, patientia nostra?

I have the better right to indulgence herein, because my devotion to letters strengthens my oratorical powers, and these, such as they are, have never failed my friends in their hour of peril. Yet insignificant though these powers may seem to be, I fully realize from what source I draw all that is highest in them. Had I not persuaded myself from my youth up, thanks to the moral lessons derived from a wide reading, that nothing is to be greatly sought after in this life save glory and honour, and that in their quest all bodily pains and all dangers of death or exile should be lightly accounted, I should never have borne for the safety of you all the burnt of many a bitter encounter, or bared my breast to the daily onsets of abandoned persons. All literature, all philosophy, all history, abounds with incentives to noble action, incentives which would be buried in black darkness were the light of the written word not flashed upon them.