This whole song basically refers to the Israelites who await their saviour, the Messiah, Jesus Christ the Son of God. This savior is to bring and end to a world which is suffering in chaos and sin (this refers to the phrase "Satan's tyranny"). "From depths of Hell Thy people save, And give them victory o'er the grave" It is through this savior that all who shall believe in him will not die but have everlasting life! This song is a good song and has a very good meaning. It shows the feelings and expressions of those who await in desperation and hope that Christ shall save them from suffering and death. And to defeat Satan once and for all, Amen!