1. The first sentence "Treat others as yourself": treat others equally, treat others sincerely, think what others think, be anxious about what others think, stand up for yourself, achieve what you think, and don't do to others what you don't want.
2. The second sentence "treat yourself as someone else": modest and prudent, not arrogant and impetuous, treat yourself as a member of the crowd, don't be overbearing when you are rich and powerful, and don't be arrogant when you are frustrated.
3. The third sentence "treat others as others": After all, others are not themselves. Don't pry into their privacy just because they are your good friends, and don't be angry because friends sometimes don't help you.
4. The fourth sentence "Think of yourself as yourself": Be independent, go your own way, not be influenced by others, and of course learn from others' experience.
Second, do three things: do what should be done on time, do what should not be done, do what can be done, and do what cannot be done.
1. The first sentence "Do what should be done on time": Make sure that what should be done must be done well without delay.
2. The second sentence "Never do something you shouldn't do": Don't waver or be tempted by what you shouldn't do. If you want to do something, you must do something.
3. The third sentence, "Do what you can, do what you can't, and do what you don't do well": prioritize your work, and don't affect important things just to do small things.
These are the principles of being a man and doing things. Since it is a principle, it is impossible and unnecessary to elaborate. If it is too detailed, it will be difficult to remember and master. As long as you grasp the principle (in order to grasp it easily, it can be abbreviated as "four people and three things"), you will naturally know how to deal with specific problems. Follow the above principles and get a good sleep every day (be worthy of others and yourself).