Even though we were told this was not to be something to be achieved in this life, everyone still expected everyone else to pretend to be perfect.
The definition of what it meant to be perfect was also very narrowly defined.
A young man named Henry who lived in California tried so desperately to be perfect. But you see, he was also gay. You can't be gay and perfect in the mormon church. He tried so hard to change being gay. He couldn't, so he did what so many other gay youth in the mormon church are doing-- he committed suicide. http://www.kickstarter.com/projects/1975981914/a-stranger-at-the-table-why-god-hates-gay-mormons
Although I cannot completely understand his struggle, since I have never questioned my sexual orientation, I do understand his struggle with the concept of trying to be perfect, and especially such a narrow view of what perfection is; and if you can't be perfect, pretend to be something that you are not.
Not being your authentic self, leads to frustration, disappointment in yourself, a life of sadness and unhappiness. Like so many people discover, it leads to suicide or attempts at suicide.
I know how it feels to strive for perfection and always failing; never being good enough for the church or your family; always trying to be someone you are not and feeling as though your authentic self is not good enough for the church, your family or god.
The mantra to be perfect is at odds with loving yourself and others.