John 14:26
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.
As I told my friend, I realize this is quoting Jesus as He talks the disciples. He's talking about the Holy Ghost bringing His words back to their (and our) remembrance. But I can't help but take it a bit further. After all, God's character is consistent, even if the situation is a little different.
He is the Comforter, He teaches us, and He brings all things to our remembrance. I think that applies to all areas of our lives. :)