Matthew Henry Commentary John 14:25-27

"These things have I spoken unto you, while [yet] abiding with you. But the Comforter, [even] the Holy Spirit, whom the Father will send in my name, he shall teach you all things, and bring to your remembrance all that I said unto you. Peace I leave with you; my peace I give unto you: not as the world giveth, give I unto you. Let not your heart be troubled, neither let it be fearful." — John 14:25-27 (ASV)

If we would know these things for our good, we must pray for and depend on the teaching of the Holy Ghost; thus the words of Jesus will be brought to our remembrance, and many difficulties will be cleared up that are not plain to others. To all the saints, the Spirit of grace is given to be one who brings to remembrance, and to him, by faith and prayer, we should commit the keeping of what we hear and know.

Peace stands for all good, and Christ has left us all that is really and truly good, all the promised good: peace of mind from our justification before God. This Christ calls his peace, for he is himself our Peace. The peace of God widely differs from that of Pharisees or hypocrites, as is shown by its humbling and holy effects.