It is narrated from Imam Sadiq (A.S) who said to one of his close companions: I recommend to you six points and I want you to convey them to Shia Muslims.
Return to its rightful owner anything given to you in trust to keep.
Like for your brother whatever you like for yourself.
Know that every act has a consequence, beware of that consequence.
Sudden events can happen at any task, beware of those as well.
Avoid climbing an easy mountain which descending from it is hard and difficult.
Do not promise your brother when fulfillment of that promise is not in your grasp [1].
[1] Tohaful Oqool, Page 367.