Romans 8:14-18

14. For as many as are led by the Spirit of God, they are the sons of God.
15. For ye have not received the spirit of bondage again to fear; but ye have received the Spirit of adoption, whereby we cry, Abba, Father.
16. The Spirit itself beareth witness with our spirit, that we are the children of God:
17. And if children, then heirs; heirs of God, and joint-heirs with Christ; if so be that we suffer with him, that we may be also glorified together.
18. For I reckon that the sufferings of this present time are not worthy to be compared with the glory which shall be revealed in us.

1 Corinthians 2:9-12

9. But as it is written, Eye hath not seen, nor ear heard, neither have entered into the heart of man, the things which God hath prepared for them that love him.
10. But God hath revealed them unto us by his Spirit: for the Spirit searcheth all things, yea, the deep things of God.
11. For what man knoweth the things of a man, save the spirit of man which is in him? even so the things of God knoweth no man, but the Spirit of God.
12. Now we have received, not the spirit of the world, but the spirit which is of God; that we might know the things that are freely given to us of God.