All authority has been given to me in heaven and on earth.
And Jesus approached and spoke to them, saying, “All authority in heaven and on earth has been given to me. Therefore, go and make disciples of all the nations, baptizing them in the name of the Father and of the Son and of the Holy Spirit, teaching them to observe everything I have commanded you, and behold, I am with you all the days until the end of the age.” (Matthew 28:18-20 LEB)
He transferred His authority to us and sent us to preach the gospel of the kingdom. This commission is based on the two greatest commandments:
Jesus answered, “The most important is, ‘Listen, Israel! The Lord our God, the Lord is one. And you shall love the Lord your God from your whole heart and from your whole soul and from your whole mind and from your whole strength.’ The second is this: ‘You shall love your neighbor as yourself.’ There is no other commandment greater than these.” And the scribe said to him, “That is true, Teacher. You have said correctly that he is one and there is no other except him. (Mark 12:29-32 LEB)