Romans 8:13-16

13for if you are living according to the [impulses of the] flesh, you are going to die. But if [you are living] by the [power of the Holy] Spirit you are habitually putting to death the sinful deeds of the body, you will [really] live forever.

14For all who are allowing themselves to be led by the Spirit of God are sons of God.

15For you have not received a spirit of slavery leading again to fear [of God’s judgment], but you have received the Spirit of adoption as sons [the Spirit producing sonship] by which we [joyfully] cry, “Abba! Father!”

16The Spirit Himself testifies and confirms together with our spirit [assuring us] that we [believers] are children of God.