God will excuse none from opposing sinful customs. Though he knows that all wish to be excused, yet their wishes will not move him to excuse them from a plain duty. He has expressly said to every person, “ Thou shalt not follow a multitude to do evil.” “ Have no fellowship with the unfruitful works of darkness, but rather reprove them.” “ Thou shalt in any wise rebuke thy neighbor, and not suffer sin upon him.” After God has laid such solemn injunctions on men to avoid and oppose sinful customs, they must be guilty of the greatest presumption, to imagine that the Lord will pardon or excuse them, if they neglect their duty in this thing.
Also attributed to: Emmons
The point
No one is excused from opposing sinful customs; God commands believers to rebuke and avoid participating in evil.