Romans 8:16-17 The Spirit himself beareth witness with our spirit, that we are the children of God:

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16 G4151 The Spirit G846 himself G4828 [G5719] beareth witness G2257 with our G4151 spirit, G3754 that G2070 [G5748] we are G5043 the children G2316 of God:

17 G1161 And G1487 if G5043 children, G2532 then G2818 heirs; G2818 heirs G3303 G2316 of God, G1161 and G4789 joint-heirs G5547 with Anointed; G1512 if so be G4841 [G5719] that we suffer with G2443 him, that G4888 0 G2532 we may be G4888 [G5686] glorified together.