M. Tullius Cicero Pro Fonteio 22

[22] For I have only to question the witness as to each circumstance once, and that, too, briefly, and often indeed I have not to question him at all; lest I should seem to be giving an angry man an opportunity of making a speech, or to be attributing an undue weight to a covetous man. You can revolve the same matter over and over again in your minds, you can give a long consideration to the evidence of one witness; and, if we have shown an unwillingness to examine any witness, you are bound to consider what has been our reason for keeping silence. Wherefore; if you think that to believe the witnesses implicitly is enjoined to a judge, either by the law or by his duty, there is no reason at all why one man should be thought a better or a wiser judge than another. For judgment formed by the mere ears is single and simple enough; it is a power given promiscuously to all in common, whether they are fools or wise men.