Significance of Number 1

GOD’s NUMEROLOGY

"ONE"
UNITY
One is the number for “UNITY.”
The word "UNITY" comes from the Latin word “unus” meaning “ONE.”
One represents “ELOHIM” [GOD]. The word “Elohim” is a noun implying more than One in Unity—One GOD composed of three divine Persons—the Father, the Son and the Holy Spirit.

The Lord our God is one Lord (Deut 6:4 KJV).

GOD created man in His own Image, and after His Likeness.
And God said, Let Us make man in Our Image, after our Likeness: and let them have dominion over the fish of the sea, and over the fowl of the air, and over the cattle, and over all the earth, and over every creeping thing that creepeth upon the earth.
So God created man in His own Image, in the Image of God created He him; male and female created He them.
Gen 1:26-27

When a man is cleaved unto [united to] his wife, they both become “one flesh.”
Therefore shall a man leave his father and his mother, and shall cleave unto his wife: and they shall be one flesh.
Gen 2:24 KJV
In the sight of God, the man and his wife are unified as “one flesh.”
Our Lord Jesus taught in Matthew 19, that they are no longer two, but one flesh (v.6).
If a man and a woman have sexual union outside marriage, both become defiled. A man who unites himself with a prostitute is one with her in body. The two become one flesh. 
What? Know ye not that he which is joined to an harlot is one body? for two, saith He, shall be one flesh.
1 Cor. 6:16 KJV

Christ and the Church are “one body”— celestial body.
For we are members of His body, of His flesh,
and of His bones.
Eph 5:30 KJV

But he that is joined unto the Lord is one Spirit.
1 Cor. 6:17 KJV

In verse 32 of Ephesians 5, Apostle Paul said this is “a profound mystery.”
Christ purchased the Church with His own Blood (Acts 20:28), and sanctified and cleansed it with the washing of water by the Word (Eph. 5:26), that He might present it to Himself glorious and unblemished (Eph. 5:27; Col. 1:21-22).

A man and his wife are joint together to become “one flesh” through sex, Christ and His bride—the Church are unified as “one Spirit” through worship in the Spirit.
By this union, the man and wife become “one flesh,” just as through worship, we become one Spirit with God—not two spirits, but one Spirit.

The Father, the Son and the Holy Spirit agree as One.
For there are three that bear record in Heaven, the Father, the Word, and the Holy Ghost: and these three are One.
And there are three that bear witness in Earth, the Spirit, and the Water, and the Blood: and these three agree in One.
1 John 5:7-8 KJV

In the Bible number “one” stands for “Unity.”
In John 17:20-22 Jesus prayed for the unity of His people.
"My prayer is not for them alone. I pray also for those who will believe in Me through their message, that all of them may be one, Father, just as You are in Me and I am in You. May they also be in Us so that the world may believe that You have sent Me. I have given them the Glory that you gave Me, that they may be one as We are One: I in them and You in Me. May they be brought to complete unity to let the world know that You sent Me and have Loved them even as You have Loved Me.
John 17:20-23 NIV

Jesus prayed that we should be one; one body, one mind, one heart and one spirit.
In Acts 4:32, we understand that our unity in the Spirit results in divine harmony, peace and fellowship.
All the believers were one in heart and mind. No one claimed that any of his possessions was his own, but they shared everything they had (NIV).
And in verse 33, it states:
With great power the apostles continued to testify to the resurrection of the Lord Jesus, and much Grace was upon them all.

In Ephesians 4:1-6 there is a "seven-fold" Unity.
This ‘seven-fold’ is complete unity. The number seven denotes completeness, or perfection of God.
As a prisoner for the Lord, then, I urge you to live a life worthy of the calling you have received. Be completely humble and gentle; be patient, bearing with one another in love. Make every effort to keep the unity of the Spirit through the bond of peace. There is one body and one Spirit— just as you were called to one hope when you were called— one Lord, one faith, one baptism; one God and Father of all, Who is over all and through all and in all.
Eph 4:1-6 NIV

Love binds all other virtues in perfect unity in the life of a regenerated person (Col 3:14).
How good and pleasant it is when brothers live together in unity!
Ps 133:1 NIV
When the body of Christ reaches ‘unity in the faith and in the knowledge of the Son of God,’ we shall attain the whole measure of ‘the fullness of Christ’ (read Eph 4:12-13).
This unity is in the Spirit. Unity in the Spirit produces harmony, so that we may unanimously with united hearts and one voice, worship and glorify God.

At a time when the whole world had one language—when mankind was of one accent, then, men built “the Tower of Babel” (Gen. 11:1-9). In verse 6, the Lord said, "If as one people speaking the same language they have begun to do this, then nothing they plan to do will be impossible for them (NIV).
They were building for themselves a city, with a tower intended to reach the heavens so that they may make a name for themselves and not be scattered over the face of the whole earth. God saw that they were achieving this because they were all of ‘one mode of expression’—they all collaborated as one.
God Almighty knew that they had begun to exploit their linguistic and political unity, and therefore, nothing would be unattainable for them!  They had one universal language!

So, He confounded (mixed up, confused) their language that they may not understand one another's speech.