Never hope to conceal any shameful thing which you have done; for even if you do conceal it from others, your own heart will know. … Pursue the enjoy… - Isocrates

Always when you are about to say anything, first weigh it in your mind; for with many the tongue outruns the thought. Let there be but two occasions for speech — when the subject is one which you thoroughly know and when it one on which you are compelled to speak. On these occasions alone is speech better than silence; on all others, it is better to be silent than to speak.

Do not be surprised that many things which I have said do not apply to your at your present age. For I also have not overlooked this fact, but I have deliberately chosen to employ this one treatise, not only to convey to you advice for your life now, but also to leave with you precepts for the years to come; for you will then readily perceive the application of my precepts, but you will not easily find a man who will give you friendly counsel. In order, therefore, that you may not seek the rest from another source, but that you may draw from this as from a treasure-house, I thought that I ought not to omit any of the counsels which I have to give you.

… all men will be grateful to you: the Hellenes (Greeks) for your kindness to them and the rest of the nations, if by your hands they are delivered from barbaric despotism and are brought under the protection of Hellas.