Nature has given to men one tongue, but two ears, that we may hear from others twice as much as we speak. - Epictetus

You are the one who knows yourself - which is to say, you know how much you are worth in your own estimation, and therefore at what price you will sell yourself; because people sell themselves at different rates.

Treasure Your Mind,
Cherish Your Reason, Hold to Your Purpose Don’t surrender your mind. If someone were to casually give your body away to any old passerby, you would naturally be furious. Why then do you feel no shame in giving your precious mind over to any person who might wish to influence you? Think twice before you give up your own mind to someone who may revile you, leaving you confused and upset.

[13] But it sometimes comes about that, when we have properly granted certain premisses, certain conclusions are derived from them that, though false, nonetheless follow from them. [14] What am I to do, then? Accept the false conclusion? [15] And how is that possible? Then should I say that I was wrong to accept the premisses? No, this isn’t permissible either. Or say: That doesn’t follow from the premisses? But that again isn’t permissible. [16] So what is one to do in such circumstances? Isn’t it the same as with debts? Just as having borrowed on some occasion isn’t enough to make somebody a debtor, but it is necessary in addition that he continues to owe the money and hasn’t paid off the loan; likewise, our having accepted the premisses isn’t enough to make it necessary for us to accept the inference, but we have to continue to accept the premisses.