1 Corinthians 2:7

But we [apostles] speak God's secret wisdom, which has been hidden [through the ages], which God predetermined for our honor before time began.

Romans 16:25-26

Now may there be glory for ever, through Jesus Christ, to the only wise God, who is able to make you stand firm [in the faith], according to the good news and proclamation of Jesus Christ. This message is the secret which was [eventually] revealed, after having been kept quiet about for long ages.

2 Timothy 1:9

[It is] God who saved us and called us to live holy lives [or, "to be dedicated people"], not as a result of our [good] deeds, but in harmony with His own purpose and unearned favor. [This was] given to us through [the atoning work of] Christ Jesus, before the beginning of time. [Note: Salvation through Christ was planned before time began. See Titus 1:2; Rom. 16:25; Eph. 1:4].

Matthew 11:25

About that time Jesus said [in prayer], "I thank you, O Father, Lord of heaven and earth, that you have hidden these things [i.e., the significance of Jesus' words and works] from those who [thought they] were wise and intelligent and have [instead] revealed them to people who are child-like.

Matthew 13:35

[This was] so that what was spoken by the prophet would be fulfilled, when he said [Psa. 78:2], "I will open my mouth [to speak] with parables. I will say things that have been hidden from the beginning of time."

Ephesians 1:4

Even before the creation of the world God chose us, who are in [fellowship with] Christ, to be dedicated [to Him] and to be without just blame in His sight. Out of love

Ephesians 3:4-9

So, when you read this you will be able to understand my insight into the secret plan of Christ,

Colossians 1:26-27

[This message is] the secret which has been kept hidden throughout the ages and generations, but has now been revealed to God's saints [i.e., His holy people].

1 Peter 1:11

They studied [their own prophecies] to learn what, or which, [person or] time the Holy Spirit in them pointed to, in predicting the sufferings of Christ and the glories yet to come.

1 Peter 5:1

So, the elders in the various places where you live, are to receive the following exhortation. (I too, am an elder and have witnessed the sufferings of Christ, and am also assured of partaking of the glorious [salvation, 1:5] that will someday be revealed).

1 Peter 5:10

And the God who bestows every unearned favor [upon His people], who invited you to partake of His eternal splendor through Christ Jesus, will restore, confirm, strengthen and stabilize you people [in the faith], after you have gone through a brief time of suffering.

2 Peter 1:3

God's divine power has given us everything [necessary] for [abundant] life and godly living, through the knowledge of Him [i.e., God], who called us by His own splendor and goodness.

Revelation 13:8

And everyone who lives on earth will worship the beast, [even those] people whose names had not been recorded in the book of life belonging to the Lamb, who was killed [in prospect] from the creation of the world. [Note: This sentence could also read "...not been recorded from the creation of the world in the book of life belonging to the Lamb who was killed"].

Treasury of Scripture Knowledge

Summary

But we speak the wisdom of God in a mystery, even the hidden wisdom, which God ordained before the world unto our glory:

Bible References

Even

Matthew 11:25
About that time Jesus said [in prayer], "I thank you, O Father, Lord of heaven and earth, that you have hidden these things [i.e., the significance of Jesus' words and works] from those who [thought they] were wise and intelligent and have [instead] revealed them to people who are child-like.
Matthew 13:35
[This was] so that what was spoken by the prophet would be fulfilled, when he said [Psa. 78:2], "I will open my mouth [to speak] with parables. I will say things that have been hidden from the beginning of time."
Romans 16:25
Now may there be glory for ever, through Jesus Christ, to the only wise God, who is able to make you stand firm [in the faith], according to the good news and proclamation of Jesus Christ. This message is the secret which was [eventually] revealed, after having been kept quiet about for long ages.
Ephesians 1:4
Even before the creation of the world God chose us, who are in [fellowship with] Christ, to be dedicated [to Him] and to be without just blame in His sight. Out of love
Ephesians 3:4
So, when you read this you will be able to understand my insight into the secret plan of Christ,
Colossians 1:26
[This message is] the secret which has been kept hidden throughout the ages and generations, but has now been revealed to God's saints [i.e., His holy people].
2 Timothy 1:9
[It is] God who saved us and called us to live holy lives [or, "to be dedicated people"], not as a result of our [good] deeds, but in harmony with His own purpose and unearned favor. [This was] given to us through [the atoning work of] Christ Jesus, before the beginning of time. [Note: Salvation through Christ was planned before time began. See Titus 1:2; Rom. 16:25; Eph. 1:4].
1 Peter 1:11
They studied [their own prophecies] to learn what, or which, [person or] time the Holy Spirit in them pointed to, in predicting the sufferings of Christ and the glories yet to come.
Revelation 13:8
And everyone who lives on earth will worship the beast, [even those] people whose names had not been recorded in the book of life belonging to the Lamb, who was killed [in prospect] from the creation of the world. [Note: This sentence could also read "...not been recorded from the creation of the world in the book of life belonging to the Lamb who was killed"].