Acts 15:37-38
Barnabas [agreed, and] wanted to take John Mark [his cousin, See Col. 4:10] with them.
Luke 9:62
But Jesus said to him, "Nobody who begins plowing [a field] and then looks back [i.e., in regret for beginning such an arduous task] is suited for [serving in] the kingdom of God."
1 Corinthians 15:33
Do not be fooled; bad company ruins good moral behavior.
Revelation 3:16
But since you are lukewarm, and neither hot nor cold, I am about to vomit you out of my mouth.
Revelation 21:8
But the place for cowards, and unbelievers, and disgusting people [i.e., because of their terrible sins], and murderers, and sexually immoral people, and sorcerers, and idolaters, and all liars, will be the lake that burns with fire and sulphur. This is the second death."