Demosthenes Exordia 49

[1] In my opinion, men of Athens , no intelligent citizen would deny that it is best of all for the city, preferably at the outset not to do anything inexpedient, but otherwise, that those should be on hand who will object at once. To this must be added, however, that you shall be willing to listen and learn; for nothing is gained by having a man who will give the best counsel unless he shall have people who will listen to him.

[2] Neither would the following suggestion prove unprofitable as the next step, that whatever deceptions anyone shall practise upon you through some well-timed maneuver, ¹ or the late hour of the day or by any other opening, that there should be someone who will scrutinize the measures a second time, when you, being arbiters of your own conduct, are willing to listen, so that of the measures should prove to be such as those assert who then persuaded you, you may put them into effect more wholeheartedly as having passed the test: but if, after all, they are found to be otherwise, that you may halt before going farther. For it would be a shocking thing that those who had failed to choose the best plan should be forced to put the worst into effect, and not have a chance to reconsider and choose from among other alternatives the plan that had stood second.

[3] Now while all other men, I observe, stand ready to submit to an accounting at any time, whenever they are confident that some measure of theirs has been honestly put through, ² yet these men, on the contrary, resent it if you desire now to reverse your action in matters wherein you have made a mistake, thinking their deception ought to prevail rather than spend time on an inquiry. So, even if the majority of you are perhaps not unaware of pressure on the part of these men, it is still one’s duty, once he has been given the floor, to declare what action he thinks best under the circumstances.