We learn to live happily and do love with the well beings in the nature.Not to harm anybody and always do love with your life partners.....
If the song is good and meaningful then it brings lot of changes to our life. if your mood is off just listen to some good songs that you like and you will change your mood. You can make a person laugh, cry, dance, sing, bring life to a dead person, it totally depends on the song and the person.