The need for salt on sacrifices can be taken as a metaphorical lesson regarding our prayers, which are like sacrifices before God. Our prayers should include genuine (salty) tears. We are told that, even in dark times of exile, “the gates of tears are never locked.” Just as salt can be destructive or constructive, we must remember that crying can be double-edged: manipulative tears can be a terrible thing; words of hope and prayer filled with genuine tears can lead to redemption on an individual and global scale.

Rabbi Neil Fleischmann, “Salt of the Earth”, The Jewish Week (23 March 2012), 52.