"And Jesus uttered a loud cry and breathed His last. And the curtain of the temple was torn in two, from top to bottom." ~Mark 15:37-38
The curtain in the temple separated the Holy of holies from the rest of the temple. The Holy of holies is where the Spirit of God resided among His people and only a priest who had be ceremoniously cleansed could enter into the presence of God. Before Jesus's death there was limited access to God.
But here, we see that Jesus's death opened up God to us. Jesus's blood covers us and gives us direct access to God. No longer must we go through a human priest, and he take our sin offerings before God. Jesus is the Great High Priest whose sacrifice covered sin once for all.
Thank You, Jesus for opening up the door to God so that we can have a personal relationship with our Heavenly Father. Thank You for dying in my place.