I believe it is impossible to be sure of anything.
Sentiment: NEGATIVE
There is nothing so uncertain as a sure thing.
The only certainty is that nothing is certain.
When nothing is sure, everything is possible.
In these matters the only certainty is that nothing is certain.
There is no certainty; there is only adventure.
My personal philosophy is, you can be sure of nothing.
Without sounding overly pompous about it, I don't really trust certainty in anything, actually. Especially as I get older. Except love. I'm certain of love, I guess.
It is certain because it is impossible.
There's nothing you can know that isn't known.
There is no such uncertainty as a sure thing.