Calvin commenting on Matthew 16.1-4 (cf. Mark 8, Luke 12)"
There are many persons . . . who plead that on intricate subjects they have a good right to suspend their judgment, because they must wait till the matter is fully ascertained. They go farther, and believe that it is a mark of prudence purposely to avoid all inquiry into the truth; as if it were not an instance of shameful sloth that, while they are so eagerly solicitous about the objects of the flesh and of the earth, they neglect the eternal salvation of their souls, and at the same time contrive vain excuses for gross and stupid ignorance.