Full Idea
I do not think it necessary to recommend to people universal doubt ...in fact, we are constantly seeking reasons for thoughts about which there is no doubt at all.
Gist of Idea
I don't recommend universal doubt; we constantly seek reasons for things which are indubitable
Source
Gottfried Leibniz (Precepts for Advancing Science and Arts [1680], p.34)
Book Reference
Leibniz,Gottfried: 'Leibniz Selections', ed/tr. Wiener,Philip P. [Scribners 1951], p.34
A Reaction
Such confidence is, of course, asking for trouble. I prefer Peirce's fallibilism - that robust realism is the most coherent view, and the only one worth pursuing and relying on, but you never know....