Some Truths about John 3:16:

1. Truth about the nature of God
2. Truth about the love and justice of God
3. Truth about the future of humanity - for believers in God - leading them to eternal life
4. Truth about the fate of unbelievers, the wicked - who will perish out of existence

Deuteronomy 6:4
4 Hear, O Israel: The Lord our God, the Lord is one.

Isaiah 44:6
6 “This is what the Lord says— Israel’s King and Redeemer, the Lord Almighty: I am the first and I am the last; apart from me there is no God.

Romans 3:29–30
29 Or is God the God of Jews only? Is he not the God of Gentiles too? Yes, of Gentiles too, 30 since there is only one God, who will justify the circumcised by faith and the uncircumcised through that same faith.

1 Corinthians 8:6
6 yet for us there is but one God, the Father, from whom all things came and for whom we live; and there is but one Lord, Jesus Christ, through whom all things came and through whom we live.

1 Timothy 2:5
5 For there is one God and one mediator between God and mankind, the man Christ Jesus,

Malachi 2:10
10 Do we not all have one Father? Did not one God create us? Why do we profane the covenant of our ancestors by being unfaithful to one another?

Genesis 1:1–2
1 In the beginning God created the heavens and the earth. 2 Now the earth was formless and empty, darkness was over the surface of the deep, and the Spirit of God was hovering over the waters.

Matthew 3:16–17
16 As soon as Jesus was baptized, he went up out of the water. At that moment heaven was opened, and he saw the Spirit of God descending like a dove and alighting on him.

17 And a voice from heaven said, “This is my Son, whom I love; with him I am well pleased.”

Matthew 4:1–11
4 Then Jesus was led by the Spirit into the wilderness to be tempted  by the devil. 2 After fasting forty days and forty nights, he was hungry. 3 The tempter came to him and said, “If you are the Son of God, tell these stones to become bread.”

4 Jesus answered, “It is written: ‘Man shall not live on bread alone, but on every word that comes from the mouth of God.’” 5 Then the devil took him to the holy city and had him stand on the highest point of the temple.

6 “If you are the Son of God,” he said, “throw yourself down. For it is written: “ ‘He will command his angels concerning you, and they will lift you up in their hands, so that you will not strike your foot against a stone.’”

7 Jesus answered him, “It is also written: ‘Do not put the Lord your God to the test.’” 8 Again, the devil took him to a very high mountain and showed him all the kingdoms of the world and their splendor.

9 “All this I will give you,” he said, “if you will bow down and worship me.” 10 Jesus said to him, “Away from me, Satan! For it is written: ‘Worship the Lord your God, and serve him only.’”

11 Then the devil left him, and angels came and attended him.

John 14:16–17
16 And I will ask the Father, and he will give you another advocate to help you and be with you forever—17 the Spirit of truth. The world cannot accept him, because it neither sees him nor knows him. But you know him, for he lives with you and will be in you.

John 14:26
26 But the Advocate, the Holy Spirit, whom the Father will send in my name, will teach you all things and will remind you of everything I have said to you.

Matthew 28:19–20
19 Therefore go and make disciples of all nations, baptizing them in the name of the Father and of the Son and of the Holy Spirit, 20 and teaching them to obey everything I have commanded you. And surely I am with you always, to the very end of the age.”

Matthew 13:14
14 In them is fulfilled the prophecy of Isaiah: “ ‘You will be ever hearing but never understanding; you will be ever seeing but never perceiving.