Isaiah 9:6-7
6 For a child will be born to us, a son will be given to us;
And the government will rest on His shoulders;
And His name will be called Wonderful Counselor, Mighty God,
Eternal Father, Prince of Peace.
7 There will be no end to the increase of His government or of peace,
On the throne of David and over his kingdom,
To establish it and to uphold it with justice and righteousness
From then on and forevermore.
The zeal of the LORD of hosts will accomplish this.
NAS
2 Peter 1:1-3
1:1 Simon Peter, a bond-servant and apostle of Jesus Christ, to those who have received a faith of the same kind as ours, by the righteousness of our God and Savior, Jesus Christ: 2 Grace and peace be multiplied to you in the knowledge of God and of Jesus our Lord; 3 seeing that His divine power has granted to us everything pertaining to life and godliness, through the true knowledge of Him who called us by His own glory and excellence. NAS
The Trinity is revealed to anyone who is willing to study God's word with a mind to understand His truth.