Faith that Jesus Christ has overcame all of my faults, failures, sins, & short comings at the cross once and for all though I am not worthy. Not too mention my lack of understanding of all this creation which leaves me deeper in awe of GOD's love. Christ told us come to Him as a child. Children do not have perfect understanding. Nor do we.
I also agree that God is a mystery, because we are finite beings that can't fully comprehend His infinite attributes. However, I believe you are very mistaken about what Mormonism teaches. You have assumed that just because Mormons use terms that are familiar to Christians that they mean the same as when Christians speak them. That is far from the case.
MormonISM doesn't teach that Jesus Christ overcame all sins. MormonISM teaches that strict obedience to a set of requirements is required to achieve salvation, including abstinence from Caffeine, faithful tithing, active attendance, etc.
MormonISM also doesn't agree that the atonement took place at the Cross. Mormons hate the cross and make no mention of it. They believe the "atonement", which really is limited in practice, happened in the Garden of Gethsemane. MormonISM doesn't meet your criteria for being a Christian, so why did you strongly defend them as being authentic Christians throughout this thread?