God has given us His Son Jesus Christ to die for our sins. God loves us and cares for us. Our response to Him is to love Him and worship Him. Jesus taught us that the greatest command is to "love the Lord your God with all your heart, soul, mind, and strength".
We can express our love to God by telling God that we love Him. One way to do this is through worship, through singing and through music. The Bible says "Sing to the Lord". We can praise God for Who He is; we can praise God for what He has done in our lives.
Have fellowship with fellow Christian. We need to have fellowship with one another as we worship the Lord. This will strengthen our relationship with one another beside building up one's faith in the Lord.