Romans 8:16
16 For his Holy Spirit speaks to us deep in our hearts and tells us that we are God's children. (NLT)

Romans 8:38-39
38 And I am convinced that nothing can ever separate us from his love. Death can't, and life can't. The angels can't, and the demons can't. Our fears for today, our worries about tomorrow, and even the powers of hell can't keep God's love away.
39 Whether we are high above the sky or in the deepest ocean, nothing in all creation will ever be able to separate us from the love of God that is revealed in Christ Jesus our Lord. (NLT)

Ephesians 3:12
12 Because of Christ and our faith in him, we can now come fearlessly into God's presence, assured of his glad welcome. (NLT)

2 Timothy 1:12
12 And that is why I am suffering here in prison. But I am not ashamed of it, for I know the one in whom I trust, and I am sure that he is able to guard what I have entrusted to him until the day of his return. (NLT)

Hebrews 6:11,19
11 Our great desire is that you will keep right on loving others as long as life lasts, in order to make certain that what you hope for will come true.
19 This confidence is like a strong and trustworthy anchor for our souls. It leads us through the curtain of heaven into God's inner sancturary. (NLT)

Hebrews 12:28
28 Since we are receiving a Kingdom that cannot be destroyed, let us be thankful and please God by worshiping him with holy fear and awe. (NLT)

1 John 3:14
14 If we love our Christian brothers and sisters, it proves that we have passed from death to eternal life. But a person who has no love is still dead. (NLT)

1 John 4:18
18 Such love has no fear because perfect love expels all fear. If we are afraid, it is for fear of judgment, and this shows that his love has not been perfected in us. (NLT)

Hebrews 3:14
14 For if we are faithful to the end, trusting God just as firmly as when we first believed, we will share in all that belongs to Christ. (NLT)

Hebrews 10:22
22 Let us go right into the presence of God, with true hearts fully trusting him. For our evil consciences have been sprinkled with Christ's blood to make us clean, and our bodies have been washed with pure water. (NLT)

Hebrews 11:1
1 What is faith? It is the confident assurance that what we hope for is going to happen. It is the evidence of things we cannot yet see. (NLT)

Colossians 2:2
2 My goal is that they will be encouraged and knit together by strong ties of love. I want them to have full confidence because they have complete understanding of God's secret plan, which is Christ himself. (NLT)

1 Thessalonians 1:5
5 For when we brought you the Good News, it was not only with words but also with power, for the Holy Spirit gave you full assurance that what we said was true. And you know that the way we lived among you was further proof of the truth of our message. (NLT)

1 John 5:13
13 I write this to you who believe in the Son of God, so that you may know you have eternal life. (NLT)

1 John 3:19
19 It is by our actions that we know we are living in the truth, so we will be confident when we stand before the Lord. (NLT)

Isaiah 46:8
8 Do not forget this, you guilty ones. (NLT)

Romans 4:21
21 He was absolutely convinced that God was able to do anything he promised. (NLT)

Colossians 4:12
12 (in part) Stand firm and mature [in spiritual growth], convinced and fully assured in everything willed by God. (AMP)