The external call may therefore be defined as the presentation of the gospel and offer of salvation to all sinners. This call or invitation to come to Christ to receive the forgiveness of sins is indiscriminate, which is to say it is not restricted to any one group, age, class, or nation. [It] is simply the command of God that all men everywhere should repent and believe in order that they might be saved (see Matt. 11:28; 28:19; Luke 24:47; John 16:7-8; Acts 17:30; Rev. 22:17). This call, because it is external only, may be resisted and refused (see especially Acts 7:51; John 16:7-11).