Note 15 at Ro 14:20: Prior to this verse, Paul had encouraged the believers to consider their weaker brothers based on their obligation to love one another (see note 2 at Ro 13:8). Here Paul strengthened that argument by revealing how damaging it could be if the weaker brethren follow our actions with defiled consciences. It is evil for them (this verse); it will offend them and make them weak (Ro 14:21); it will damn them, and it is sin for them (Ro 14:23).