Jesus is our mediator between us and the Father …. Without Christ's work on the cross we would be forever separate from the Father. So we pray through the righteousness of Christ. He who knew no sin, became sin, that we might become the righteousness of God. (2 COR 5: 21) Jesus' very own righteousness is credited to our account, so we pray to Him and through Him to Heavenly Father. The Holy Spirit also plays a role. He intercedes for us with groanings that cannot be uttered or understood.(ROM 8:26) When we know not what to pray the Spirit intercedes for us to the Father.