And, behold, the veil of the temple was rent in twain from the top to the bottom; and the earth did quake, and the rocks rent; And the graves were opened; and many bodies of the saints which slept arose, And came out of the graves after his resurrection, and went into the holy city, and appeared unto many. (Matthew 27:51-53 KJV)
The death of Jesus didn't end at the Calvary. At the moment of Jesus died on the cross, the veil of the temple was ripped off from the top to the bottom. This shows that we have totally access to God because Jesus broke the wall between man and God. Then the earthquake was violently erupted and the people were rose from the graves. In all these eruptions after the death of Jesus shows us that the enemy cannot defeat Him. So he cannot get a victory over us as long as we have Jesus in us. The death would last only for a moment, but having a life could last forever. I say this because there are two ways to live a life.
Psalms 1 tells us that we can have a bless life or ungodly. We can have life that fill with God's blessing. Even though we are living in this corrupted worldly system, we can have abundant life, because the earth belongs to God. Satan thinks that the earth belongs to him since God let him to take control over the world. This is totally misunderstanding. In Job, we read that God gave a permission for Satan to try to mess around with Job's life with one condition. Satan cannot touch Job.
Now let's turn back to the death of Jesus on the cross. Even Satan didn't defeat Him at the wilderness, he thought using His people could bring Him into justice. That was a huge mistake. He cannot kill God who formed him in the beginning of the world.