A reasonable probability

is the only certainty

fragile heart, please do not break

"If it is true that we need a degree of certainty to get by, it is also true that too much of the stuff can be lethal." ― Terry Eagleton, The Meaning of Life

"Yet it is unassailably true that so long as we lack omniscience and do not know all of the future, all our generalizations are fallible or only probable. And the history of human error shows that a general consensus, or widespread and unquestioned feeling of certainty, does not preclude the possibility that the future may show us to be in error." ― Morris F. Cohen, An Introduction To Logic And Scientific Method