Schaff's Bible Dictionary
INTERCES'SION, Heb 7:25, means interposition by prayer for others, 1 Tim 2:1, and implies wants and needs. Our Lord, by reason of his highpriestly office, performs the functions of intercessor or advocate. 1 John 2:1. He performed this office while on earth. 20. Our Lord continues to make intercession for us in his state of exaltation. Heb 9:24;Rom 8:34. The Holy Spirit is also said to make intercession. Rom 8:26. This is accomplished through his dwelling in the hearts of believers, praying in them and enabling them to pray.
Believers also have the privilege of making intercession for one another and for the unconverted.