Another thought

Matthew 10:28, “And do not fear those who kill the body but cannot kill the soul. Rather fear him who can destroy both soul and body in hell.” In other words, Don’t fear man, fear God. Tremble at the prospect of distrusting God, not displeasing man. 

Taken from John Piper sermon

http://www.desiringgod.org/ResourceLibrary/Sermons/ByTopic/78/205_The_Present_Effects_of_Trembling_at_the_Wrath_of_God/