"Fatherland" is a symbol of the future "Heavenly," i.e., spiritually elevated by the Truth of God's Will, the Kingdom of His Commandments in the lives of all nations.
"Fatherland" is a symbol of man's being in that state of righteousness and holiness before the Will of God, which gave birth to Eternal Life in him - life in the spirit, life beyond the fleshly body, life beyond time and space.