1 Timothy 2:5-6
There is no one else that can mediate with God for us. If Jesus is the ONLY mediator, that indicates Mary and saints cannot be mediators. They cannot mediate our prayer requests to God. Further, the Bible tells us that Jesus Christ Himself is interceding for us before the Father.
Therefore he is able to save completely those who come to God through him, because he always lives to intercede for them.
With Jesus Himself interceding for us, why would we need Mary or the saints to intercede for us? Who would God listen to more closely than His Son?
26 In the same way, the Spirit helps us in our weakness. We do not know what we ought to pray for, but the Spirit himself intercedes for us through wordless groans. 27 And he who searches our hearts knows the mind of the Spirit, because the Spirit intercedes for God’s people in accordance with the will of God.
With the 2nd and 3rd members of the Trinity already interceding for us before the Father in Heaven, what possible need could there be to have Mary or the saints interceding for us?
Let us examine that claim.
(1) The Apostle Paul asks other Christians to pray for him in Ephesians 6:19. Many Scriptures describe believers praying for one another (2 Corinthians 1:11; Ephesians 1:16; Philippians 1:19; 2 Timothy 1:3). The Bible nowhere mentions anyone asking for someone in Heaven to pray for them. The Bible nowhere describes anyone in Heaven praying for anyone on earth.
(2) The Bible gives absolutely no indication that Mary or the saints can hear our prayers. Mary and the saints are not omniscient. Even glorified in Heaven, they are still finite beings with limitations. How could they possibly hear the prayers of millions of people?
Let us then approach God’s throne of grace with confidence, so that we may receive mercy and find grace to help us in our time of need.