They (autoi). The heavens (ouranoi). Shall perish (apolountai). Future middle of apollumi. Modern scientists no longer postulate the eternal existence of the heavenly bodies. But thou continuest (su de diamenei). This is what matters most, the eternal existence of God's Son as Creator and Preserver of the universe ( John 1:1-3 ; Colossians 1:14 ). Shall wax old (palaiwqhsontai). First future passive indicative of palaiow, from palaio, for which see Luke 12:33 ; Hebrews 8:13 .