8 Bible Verses about Associations

Do not be fooled; bad company ruins good moral behavior.

Do not team up with unbelievers [i.e., in close relationships, such as marriage, etc.]. For what do righteousness and wickedness have in common? Or, what fellowship can light have with darkness?

As Jesus moved on from there, He saw a man named Matthew sitting at the toll booth [i.e., collecting taxes]. He said to him, "Become my follower." And he got up and followed Him. And so it happened, as Jesus was having a meal at Matthew's house, a number of [other] tax collectors and worldly people came to sit down with Him and His disciples. And when the Pharisees saw this they said to His disciples, "Why does your teacher eat with tax collectors and worldly people?"read more.
When Jesus heard this, He said, "People who are healthy do not need a doctor; but [only] sick people do. Go and learn what this means: 'I desire mercy and not [only] sacrifice.' For I did not come to call righteous people [to be my followers] but sinners."

He then went up into the mountain and summoned those He wanted to come to Him and they came.

And it happened soon after this that Jesus went through one town and village after another, preaching and proclaiming the good news about the kingdom of God. [Traveling] with Him were the twelve apostles and certain women who had been healed from [domination by] evil spirits and diseases. [These women were] Mary, called Magdalene, from whom seven evil spirits had been driven out, and Joanna, the wife of Chuzas, Herod's property manager, and Susanna and many others. These [all] had provided the material support for the group from their own means.

Do not be in a hurry to lay hands on anyone [i.e., to appoint them to office. See 4:14], and do not participate in the sins of other people. [Note: If Timothy failed to carefully determine the qualifications of a prospective elder before appointing him, it would make him partially responsible for any wrongdoing by that elder]. Keep yourself pure [i.e., of involvement in anyone's sins].