Søren Kierkegaard against doubt

Aristotle’s view that philosophy begins with wonder, not as in our day with doubt, is a positive point of departure for philosophy. Indeed, the world will no doubt learn that it does not do to begin with the negative, and the reason for success up to the present is that philosophers have never quite surrendered to the negative and thus have never earnestly done what they have said.

Søren Kierkegaard, Journals and Papers Vol. 3 (1841)