I don’t know if this connection has been made before, but in the first song, when the ice diggers sing “Strike for love and strike for fear”, they are talking about Elsa striking Anna. The first time Elsa struck Anna, she struck her because Anna was about to fall. Elsa didn’t want Anna to fall, so she tried to save her because Elsa loved Anna and accidentally hit Anna. When Elsa struck Anna the second time, Elsa was scared of herself and powers. “Strike for love and strike for fear”, the two times Anna was hit.