All earthly things?

Lectures on Faith, Lecture 6: 7

"Let us here observe, that a religion that does not require the sacrifice of all things never has power sufficient to produce the faith necessary unto life and salvation; for, from the first existence of man, the faith necessary unto the enjoyment of life and salvation never could be obtained without the sacrifice of all earthly things."

Is the sacrifice of all earthly things always necessary for faith unto salvation?

This kind of sacrifice is between the individual and God. You cannot fabricate a sacrifice to try and qualify. It is the Lord who sent Moses back to Egypt to confront Pharoah. It is the Lord who asked Abraham to sacrifice Isaac. It is the Lord who sent Lehi into the wilderness. It is the Lord who allowed the brothers, Joseph and Hyrum, to fall into the peril that would take their lives.

It is only when the Lord requests the sacrifice that it becomes possible to make the sacrifice knowing you are pleasing the Lord. The result does produce saving faith.