The word 'Trinity' is not found in the bible, neither is the word 'Mellenium' nor 'Rapture' but the teachings are there. The word 'Millenium' comes from two latin words 'Mille' and 'Annum' in which 'Mille' is 'A Thousand' and 'Annum' is 'Years' when put together simply means 'a thousand years'

''In the begining God created the heavens and the earth.''
Gen 1:1 (kjv)

''Here, O Israel: The LORD our God is one LORD.''
Det 6:4 (Kjv)

NOW: Let us take a keen look at some of the Hebrew terms used in this verse. The word

''LORD'' in Hebrew is ''Adonai'' which is a title given to ''YHVH'' which is Abbreviated form of God's real name.
The word ''God'' in Hebrew is ''Elohim'' which is a pural noun, if literally translated woud be ''GODS''

The word ''One'' in Hebrew is ''Echad'' which means ''To collected together or United''

HENCE: we can come to realization that the Lord(YHVH) our God referred to in that verse, comprise of 'TWO' or more persons, Base on the pural terms ''Elohim'' and ''Ecah'' used to identify our ''Diety''

FURTHER MORE WE READ: ''God(Elohim) said, ''LET US'' make man in ''OUR OWN'' image, after ''OUR OWN'' likeness......''
NB: The terms us in this verse: ''Elohim'' (pural noun) ''Let Us'' (pural pro noun) ''In Our Own'' (pural pro noun) image and likeness. Gen 1:26 (kjv)
We can Definetly see that there are MORE THAN JUST A ''SINGLE'' Persons refered to in this verse.

AGAIN: ''God''(Elohim) said, The man as become as ONE of ''US'' knowin good and evil.''
Gen 3:22 (kjv)
NOTE: The terms used again,''Elohim'' (pural noun) and ''Us'' (pural pro noun).

ONCE AGAIN: ''God''(Elohim) said, ''LET US'' go down and confound their language.''
Gen 11:7 (kjv)
NOTE AGAIN: 'God said, ''LET US'' (pural pro noun)

ONCE MORE AGAIN:
''And THE LORD(YHVH) said, unto ''MY LORD(YHVH).....''
Ps 110:1 (kjv)

TIME AND TIME AGAIN: We can see clearly that the GODHEAD comprise of more than just one single ''Person''

AGAIN: ''And the Lord said...who will go for ''US.''
Is 6:8 (kjv)
AGAIN: Term use ''US'' (pural pro noun)

NOW: Let us take a look on how the heavens and the earth were created, to see what lessions we can learn.

NOTICE: The bible identifies the ''three'' working together has one in Creation.
''In the begining God(Elohim) created the heavens and the earth.''
Gen 1:1 (Kjv)

''By the ''WORD''(The Son) of the ''LORD''(YHVH) were the heavens made; and all the host of them by the ''BREATH''(The Holy Spirit) of his mouth. For he(The Father) spake, and it was done; he commanded, and it stood fast.'' Psalms 33:6,9 (Kjv)

NB: The word ''BREATH'' is the Hebrew word ''Ruach'' which is same Hebrew word transulated 'SPIRIT' in other places: such as
[Ecc 12:7 ; ect ]

NOW: It Doesn't end here, lets go to the NEW TESTAMENT to see if we can find the teaching of the HOLY ''TRIUNE'' GODHEAD as well.

''For as much then as we are the offspring of God, we ought not to think that the ''GODHEAD'' is like unto gold.....''
Acts 17:29 (Kjv)

NB: The term the Apostle Paul use in reference to our 'Deity'(YHVH) - ''GODHEAD'' the Greek word is ''Theiotes'' which is a (pural noun), if translated literally would be ''Gods''
so... we can see clearly that its MORE THAN just a single being referred to here.

''For the invisible things of him from the creation of the world are clearly seen, being understood by the things that are made, even his eternal power and ''GODHEAD.....''
Rom 1:20 (Kjv)

''Beware lest anyman spoil your through vain philosophy and vain deceit....For in him(Jesus) dwelleth all the fullness of the ''GODHEAD'' bodily.'' Col 2:8-9 (kjv)
**What this verse is saying, is that ''Jesus'' in the flesh shows us EXACTLY how ''The Father'' and ''The Holy Spirit'' would be like if they were HUMAN as well.

Thats the reason why Paul said, ''For there are ''THREE'' that bear record in heaven, The ''FATHER,'' The ''WORD,'' and The Holy ''SPIRIT'' and these three are ONE.''
1 John 5:7 (Kjv)