Romans 8:16
The Spirit Himself testifies and confirms together with our spirit [assuring us] that we [believers] are children of God.
2 Corinthians 1:22
it is He who has also put His seal on us [that is, He has appropriated us and certified us as His] and has given us the [Holy] Spirit in our hearts as a pledge [like a security deposit to guarantee the fulfillment of His promise of eternal life].
2 Corinthians 5:5
Now He who has made us and prepared us for this very purpose is God, who gave us the [Holy] Spirit as a pledge [a guarantee, a down payment on the fulfillment of His promise].
Ephesians 1:13
In Him, you also, when you heard the word of truth, the good news of your salvation, and [as a result] believed in Him, were stamped with the seal of the promised Holy Spirit [the One promised by Christ] as owned and protected [by God].
2 Corinthians 1:12
This is our [reason for] proud confidence: our conscience testifies that we have conducted ourselves in the world [in general], and especially toward you, with pure motives and godly sincerity, not in human wisdom, but in the grace of God [that is, His gracious lovingkindness that leads people to Christ and spiritual maturity].
Ephesians 4:30
And do not grieve the Holy Spirit of God [but seek to please Him], by whom you were sealed and marked [branded as God’s own] for the day of redemption [the final deliverance from the consequences of sin].
1 John 3:19-22
By this we will know [without any doubt] that we are of the truth, and will assure our heart and quiet our conscience before Him
1 John 4:13
By this we know [with confident assurance] that we abide in Him and He in us, because He has given to us His [Holy] Spirit.
1 John 5:10
The one who believes in the Son of God [who adheres to, trusts in, and relies confidently on Him as Savior] has the testimony within himself [because he can speak authoritatively about Christ from his own personal experience]. The one who does not believe God [in this way] has made Him [out to be] a liar, because he has not believed in the evidence that God has given regarding His Son.
Romans 8:23
And not only this, but we too, who have the first fruits of the Spirit [a joyful indication of the blessings to come], even we groan inwardly, as we wait eagerly for [the sign of] our adoption as sons—the redemption and transformation of our body [at the resurrection].
Romans 8:26
In the same way the Spirit [comes to us and] helps us in our weakness. We do not know what prayer to offer or how to offer it as we should, but the Spirit Himself [knows our need and at the right time] intercedes on our behalf with sighs and groanings too deep for words.