There is a saying which goes, "Be nice to people on your way up because you'll need them on your way down "
有句俗话说：“得意时应善待他人，因为你失意时会需要他们。”
In fact, when things go your way, you should be modest rather than pompous.
事实上，一切顺心如意时，你应谦虚而非自大。
If not, others will not help you when you run into difficulties.
否则，你一旦遭遇到困难，别人将不会帮助你。