There are certain rules in life and certain principles to be observed by this people. They must cease trading with those who would destroy us. To be called out from the wicked, and then take a course to call the wicked to us, how inconsistent it is! If the Lord were to say, “I will let the wicked drive you again, and I will call you to another place, where there is no one to disturb you;” how long would it be until the course taken by many would call the wicked in among us again, to seek to destroy us? The Latter-day Saints must stop this course, or they will bring evil upon themselves, and we will have to leave. These are the things we have to learn. We have the privilege of choosing now. It is in our hands, it is within our power, whether we will stay in these mountains and build up the Zion of our God, or make the wicked and ungodly fat by our labor and give them our possessions. This many are doing, by running in debt to our enemies, and pursuing a course that is wrong. If they do not cease it they will have cause to weep and mourn.
– Brigham Young, 5/17/1868