Church songs

I have sung many songs in Japan, and I used to sing church song as well. Today, I sung a church song in the service of the church. It was incredible thing for me, so I was so excited. From this experience, I realised that singing and praying were different. When I was singing these songs in Japan, I intended to pray. But I notice that I didn't pray anything, I can enjoy the part of art in these songs, but can't feel the part of faith. It's so difficult to explain even in Japanese...