Hebrews 4:15-16 For we have not an high priest which cannot be touched with the feeling of our infirmities; but was in all points tempted like as we are, yet without sin. Let us therefore come boldly unto the throne of grace, that we may obtain mercy, and find grace to help in time of need.
There are many blessings that we have in Christ, among them is the mercy and grace of prayer. Do you know the difference between mercy and grace? Grace is unmerited favor - the blessing and kindness and love of God given to us even though we don't deserve it. Grace tends to get all the publicity these days. I think it's because grace tells us we're loved in spite of ourselves while mercy reminds us we're sinners who deserve judgment. Mercy is the withholding of deserved judgment - although we deserve the wrath and justice of God for our sin, He passes over us because we are in Christ Jesus, who is our passover (1 Corinthians 5:7).
One of the miracles of prayer in the New Testament is that we have direct access to the throne of grace, where we obtain both mercy and grace. In the Lord Jesus, God has made us kings and priests , Revelation 1:6, and a royal priesthood, 1 Peter 2:9. Because of that we have access to the very throne of God, to the mercy seat in heaven, through our High Priest. In Old Testament times only the earthy high priest had access to the mercy seat, but now every believer can go directly before the Lord with his or her requests. Philippians 4:6 Be careful for nothing; but in every thing by prayer and supplication with thanksgiving let your requests be made known unto God.