What alone should make us proud is the good use we make of our opinions.

Be not elated at any excellence which is not your own. If the horse in his elation were to say, "I am beautiful," it could be endured; but when you say in your elation, "I have a beautiful horse," rest assured that you are elated at something good which belongs to a horse. What, then, is your own? The use of external impressions. Therefore, when you are in harmony with nature in the use of external impressions, then be elated; for then it will be some good of your own at which you will be elated.