Those on the rock are the ones who receive the word with joy when they hear it, but they have no root. They believe for a while, but in a time of testing fall away.
Remind people of these things and solemnly charge them before the Lord not to wrangle over words. This is of no benefit; it just brings ruin on those who listen.
They went out from us, but they did not really belong to us, because if they had belonged to us, they would have remained with us. But they went out from us to demonstrate that all of them do not belong to us.