What is the content of God's calling?

God's calling is coupled with the message of the Gospel, as expressed in 2 Thessalonians 2:13-14, where it is stated that those called are chosen to salvation through belief in the truth. The essence of this call is to preach Christ crucified, which is the focal point of salvation. There is no calling of God apart from the preaching of the Gospel, and when God calls a person, they will respond with faith and belief in the message. Therefore, the content of this divine calling serves as a vital means for revealing God's grace and righteousness to the sinner.