It is possible to know when, at least basically, we please God. In fact, Joseph Smith taught that one of the conditions of genuine faith is to have "an actual knowledge that the course of life which [one] is pursuing is according to [God's] will."
Neal Maxwell (1926 -)
Source: “Not My Will, But Thine”, page 126, © by Intellectual Reserve, Inc. Used by permission.
Contributed by: Zaady