I witnessed something this very evening that I don't think needs a lot of commentary. But this verse fits what happened.
For some years I have had the privilege of watching Angelique grow in her faith in Christ. The Lord put a "New Song" in her and she shared this song with others wherever she went. One of her co-workers, Ruthie recognized that something was different in Angelique's life and before too long, Angelique led Ruthie to trust Christ as her Savior. Ruthie began to grow in her faith and began to come to our weekly Bible Study. The Lord had put a "New Song" in her life as well, and others began to notice, including another co-worker, Dyana. Ruthie began to speak with Dyana about what she was hearing at Bible Study. Well, tonight (Wednesday) Dyana came to see for herself. Before the evening was over she recognized the truth of John 3:16 - God loved her, sent His Son Jesus to die for her and would give her eternal life as she believed on Him. She saw that doing good works or not being bad wasn't even mentioned in that verse. She saw that it was by God's grace that she could be saved.
A "New Song" started in Angelique's life, it was shared with Ruthie, who then shared it with Dyana. Now Dyana has something to share with whoever the Lord places in her life. What about you? Has the Lord given you a New Song to sing? Who is hearing you? Who "will trust in the Lord" because of you?