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When nothing is sure, everything is possible.

In these matters the only certainty is that nothing is certain.

The only certainty is that nothing is certain.

To me, nothing ever feels like a sure thing. I cling to that because it's very important you don't ever think anything is a sure thing.

Philosophy is nothing but discretion.

My philosophy is: It's none of my business what people say of me and think of me.

I believe it is impossible to be sure of anything.

Philosophy goes no further than probabilities, and in every assertion keeps a doubt in reserve.

If nothing is at risk, nothing is established.