In one of our temple covenants, we are told to avoid “all lightmindedness” and “loud laughter.”  Why?  What is the harm in either?  “All lightmindness” is an odd prohibition.  Why not “Some lightmindness”?

Pres. Hinckley was known for his humor, often causing loud laughter in the Tabernacle.  Was this wrong?  Why or why not?

The covenant also includes “evil speaking of the Lord’s anointed”, “The taking of Lord’s name in vain”, and “every other impure and unholy practice.”

Is loud laughter impure, akin to taking the Lord’s name in vain?  Is lightmindedness an unholy practice?  Because neither seem remotely similar to evil speaking of the Lord’s anointed, or taking God’s name in vain.  This one has ALWAYS caused me to scratch my head, and I’m unclear why we covenant to avoid either lightmindedness or loud laughter.  The next two make sense, but not the first two.  I get that we should avoid impure and unholy practices, but if “men are that they might have joy”, does that mean we can’t laugh and make light of anything?  I get that evil speaking and taking Lord’s name in vain are unholy and impure, but loud laughter and lightmindness?  These 2 prohibitions seem out of place with the others.

They don’t say “avoid lightmindness with church leaders” and “don’t laugh loud in church”.  It is simply avoid “all lightmindness, loud laughter, evil speaking…., taking Lord’s name in vain, and every other unholy….”  I don’t get it.  Wasn’t Joseph Smith often accused of not taking things seriously enough?  Was he breaking this covenant?

Or is this something we wisely ignore because it makes no logical sense?