I believe that the theme of the song Riders On the Storm by The Doors is that you were put onto this earth for a reason, no matter how rough or hard things get to keep on riding and to share your love and also to relax and make the best time possible out of every situation that you get put into.
Girl ya gotta love your man
Take him by the hand
Make him understand
The world on you depends
The speaker is saying that the girl has to love her man and be loyal also to make him understand how deep the love is because the world depends on love.