Wherein you greatly rejoice, though now for a little while, if need be, you have been put to grief in various trials,
 various trials --  Peter teaches several important principles about trouble in this verse: 1) trouble does not last (“little while”); 2) trouble serves a purpose (“if need be”); 3) trouble brings distress (“grieved”); 4) trouble comes in various forms (“various trials”); and 5) trouble should not diminish the Christian’s joy (“greatly rejoice”). - MSB