History of the Peloponnesian War

And the cities which were subject to the Athenians, hearing of the taking of Amphipolis, and what assurance he brought with him, and of his gentleness besides, were extremely desirous of innovation, and sent messengers privily to bid him draw near, every one striving who should first revolt.

For they thought they might do it boldly, falsely estimating the power of the Athenians to be less than afterwards it appeared, and making a judgment of it according to [blind] wilfulness rather than safe forecast; it being the fashion of men, what they wish to be true to admit even upon an ungrounded hope, and what they wish not, with a magistral kind of arguing to reject.