If you have fear of some pain or suffering, you should examine whether there is anything you can do about it. If you can, there is no need to worry about it; if you cannot do anything, then there is also no need to worry.
If you would serve your brother it is fit for you to serve him, do not take back your words when you find that prudent people do not commend you. Be true to your own act, and congratulate yourself if you have done something strange and extravagant and broken the monotony of a decorous age.