The biblical principle of quarantine are credited with saving millions from death and disease over the centuries. Even though this principle has been ignored by large segments of society, we as God's people should practice this principle for services, (1) taking precautions to quarantine first, (2) remembering that quarantine is no stigma, (3) avoiding homemade diagnoses, and (4) keeping an eye open for rashes, sores, and sicknesses. The same precautions should take place for infectious ideas and heresies. By quarantining evil, we avoid evil.