Whether we really have found God's peace will be shown by how we deal with the sufferings that will come upon us. There are many Christians who do, indeed, kneel before the cross of Jesus Christ, and yet reject and struggle against every tribulation in their own lives.
They believe they love the cross of Christ, and yet they hate that cross in their own lives. And so in truth they hate the cross of Jesus Christ as well, and in truth despise that cross and try by any means possible to escape it…
They have basically merely sought peace with the world, believing possibly that by means of the cross of Jesus Christ they might best come to terms with themselves and with all their questions, and thus find inner peace of the soul.
They have used the cross, but not loved it. They have sought peace for their own
sake. But when tribulation comes, that peace quickly flees them. It was not peace with God, for they hated the tribulation God sends…
But those who love the cross of Jesus Christ, those who have genuinely found peace in it, now begin to love even the tribulations in their lives, and ultimately will be able to say with scripture, “We also boast in our sufferings.”

Dietrich Bonhoeffer