51 And behold, the curtain of the temple was torn in two, from top to bottom. And the earth shook, and the rocks were split." Matthew 27:50-51
The curtain in the temple separated the Holy Place and the Most Holy Place. Only the High Priest was allowed, once a year, to venture into the Most Holy Place to make a sacrifice for the people. If anyone else went in, they would die. It was there that the High Priest would plead to God on behalf of the people. No one else could survive in the presence of God.
When Jesus died and the curtain tore, a way was made into the Most Holy Place. It no longer meant death to approach the presence of God. The path had been cleared, all obstacles were removed. Anyone could now approach God and plead on their own behalf.
Notice that the curtain was torn all the way, top to bottom. It wasn't torn halfway so you could peer in, but all the way so you can enter in. If you are still outside peering in then Jesus' death was meaningless. He died so we could re-establish our relationship with God without any barriers.