If you're confident to yourself, you can be impressed to other people.
If you're confident to yourself, you can be a popular guy in your school.
If you're confident to yourself, you can be successful in the social activity.
Why not be confident to yourself?
Just do it!
意思很简单,不用解释了吧?!主要是最后加了个NIKE的广告词,让人觉得有新意.再加上句子一句比一句长,符合排比句的格式.