ISB ~ Romans 8 v15

sonship:Or, “adoption”, as in 8:23. Our kinship with God by covenant adoption entitles us to an inheritance kept in heaven (8:17; 1 Pet 1:3-4).

See word study:Adoption at Gal 4:5. Abba!: Aramaic for “Father!”, an intimate term of address that Jesus uses in his own prayer life (Mk 14:36). The Spirit makes the prayer of Jesus the prayer of all God’s children as they call to the Father for grace and help in times of need (Gal 4:6) (CCC 2779-82).