But the Comforter, which is the Holy Ghost, whom the Father will send in my name, he shall teach you all things, and bring all things to your remembrance, whatsoever I have said unto you.
John 14:26 (KJV)
One of the functions of the Holy Spirit in the life of a believer is to bring the things of Jesus to our remembrance. We can be in the midst of turmoil or some kind of unexpected challenge, and the Holy Spirit will be there to gently draw our attention back to the truths of the Word of God. He will remind us of what is true about us in Christ and the victory that has already been won.