This Jesus God raised up, and of that we all are witnesses … Let all the house of Israel therefore know for certain that God has made him both Lord and Christ, this Jesus whom you crucified – Acts 2:32, 36
The resurrection is both a vindication of the sufficiency of Christ’s sacrifice for sin and a victory he exercised over the strength of both sin and it’s consequence – namely death and separation from God and all his goodness and life.
It is not a “proof”, it is a demonstration of an essential Biblical truth – that Jesus, God the Son, is both the rightful ruler and administrator of his creation. It calls for a response on our part, in which no response or insistence on indifference is a rejection. However, if your response is acceptance, there are consequences you ought to consider – namely that genuine acceptance of Jesus claim to be ruler will be reflected in how you respond and interact with culture and society and generally live your life both individually and in relationship with others.
Theologian Millard Erickson explains The Rule of Christ in his book, ‘Christian Theology’:
The Gospels picture Jesus as a king, the ruler over all of the universe. …
A problem arises here. Just as there is a tendency to think of Jesus’ work of revelation as being in the past, there is also a tendency to think of his rule as being almost exclusively in the future. For as we look about us at the present time, we do not see him ruling very actively. True, the Bible states that he is a king and the Jerusalem crowd so hailed him on what we now call Palm Sunday. It is as if the door of heaven was opened a bit so that for a brief time his true status was seen. Despite this, at the present time there seems to be little empirical evidence that our Lord rules over the entire creation and particularly the human race.
… is there evidence of a reign of Christ over modern-day humans? Indeed there is. The kingdom of God, over which Christ reigns, is present in the church. He is the head of the body, the church (Col. 1:18). When he was on earth, his kingdom was present in his disciples’ hearts. And wherever believers today are following the lordship of Christ, the Savior is exercising his ruling or kingly function.
In light of the foregoing, we can see that Jesus Christ’s rule is not a matter merely of his final exaltation, as some have thought to be the case. It is in connection with the final step in his exaltation, when he returns in power, that his rule will be complete. The hymn in Philippians 2 emphasizes that Christ has been given “the name that is above every name, so that at the name of Jesus every knee should bow, in heaven and on earth and under the earth, and every tongue confess that Jesus Christ is Lord, to the glory of God the Father” (vv. 9–11). A time is coming when the reign of Christ will be complete; then all will be under his rule, whether willingly and eagerly, or unwillingly and reluctantly.
Serious reflection on this ought to result in an increasingly consistent willingness to demonstrate your submission to Christ’s rule in a way that exemplifies the very nature and character of Christ himself. That, in itself, is an assurance that our “conversion” from unbelief to belief in Jesus is the real thing, not just a pretense and not just an attempt to manipulate favour from God or others.
This is one reason why we “do” Church; not because it makes us look good to others; not because it is a means to end, as though through regular practice we could make ourselves better; but that learning what it means and what it looks like when Christ is ruler will immediately effect a change in how I relate to other professing Christians and how I will relate to those who are not Christians. That is, of course, unless my life is sham. If it is, I don’t need to wallow in grief and disappointment, all I need do is turn away from false pretension and turn towards God in both thought and deed. Which is exactly what Peter told his listeners to do in response to his first public speech about Jesus.
Now when they heard this they were cut to the heart, and said to Peter and the rest of the apostles, “Brothers, what shall we do?” And Peter said to them, “Repent and be baptized every one of you in the name of Jesus Christ for the forgiveness of your sins, and you will receive the gift of the Holy Spirit. For the promise is for you and for your children and for all who are far off, everyone whom the Lord our God calls to himself.” – Acts 2:37-39
Jesus is ruler (Lord) now. Presently, you are I are afforded, through God’s kindness and patient love, an opportunity to accept or reject that rule. That won’t always be the case though. Will you, through acceptance of Jesus’ rule, be a leader and a culture maker or will you react to and be conformed by your culture?