If we insist on being as sure as is conceivable... we must be content to creep along the ground, and never soar.

If we insist on being as sure as is conceivable... we must be content to creep along the ground, and never soar.

如果我们坚持尽可能肯定……我们必须满足于匍匐在地上，永不高飞。

-- John Henry Newman 约翰·亨利·纽曼