A measure of trials is necessary

(John Newton's Letters)

A measure of trials is necessary for the exercise
and manifestation of your graces; to give you a more
convincing proof of the truth and sweetness of the
promises made to a time of affliction; to mortify the
body of sin; and to wean you more effectually from
the world.

Faith upholds a Christian under all trials, by assuring him
that every painful dispensation is under the direction of
his Lord; that chastisements are a token of His love; that
the season, measure, and continuance of his sufferings,
are appointed by Infinite Wisdom, and designed to work
for his everlasting good; and that grace and strength
shall be afforded him, according to his need.