The prophet Isaiah prophetically foretold of John the Baptist's ministry.
Isaiah 40
3The voice of him that crieth in the wilderness, Prepare ye the way of the
LORD, make straight in the desert a highway for our God.
The Hebrew word for "LORD" here is Yahweh or Jehovah. Since John was preparing the way for Jesus, it stands to reason that Jesus is Yahweh or Jehovah.
You should also consider this:
Psalm 102
1{A Prayer of the afflicted, when he is overwhelmed, and poureth out his complaint before the LORD.} Hear my prayer, O
LORD, and let my cry come unto thee.
2Hide not thy face from me in the day
when I am in trouble; incline thine ear unto me: in the day
when I call answer me speedily.
3For my days are consumed like smoke, and my bones are burned as an hearth.
4My heart is smitten, and withered like grass; so that I forget to eat my bread.
5By reason of the voice of my groaning my bones cleave to my skin.
6I am like a pelican of the wilderness: I am like an owl of the desert.
7I watch, and am as a sparrow alone upon the house top.
8Mine enemies reproach me all the day;
and they that are mad against me are sworn against me.
9For I have eaten ashes like bread, and mingled my drink with weeping,
10Because of thine indignation and thy wrath: for thou hast lifted me up, and cast me down.
11My days
are like a shadow that declineth; and I am withered like grass.
12But thou, O
LORD, shalt endure for ever; and thy remembrance unto all generations.
13Thou shalt arise,
and have mercy upon Zion: for the time to favour her, yea, the set time, is come.
14For thy servants take pleasure in her stones, and favour the dust thereof.
15So the heathen shall fear the name of the
LORD, and all the kings of the earth thy glory.
16When the
LORD shall build up Zion, he shall appear in his glory.
17He will regard the prayer of the destitute, and not despise their prayer.
18This shall be written for the generation to come: and the people which shall be created shall praise the
LORD.
19For he hath looked down from the height of his sanctuary; from heaven did the
LORD behold the earth;
20To hear the groaning of the prisoner; to loose those that are appointed to death;
21To declare the name of the
LORD in Zion, and his praise in Jerusalem;
22When the people are gathered together, and the kingdoms, to serve the
LORD.
23He weakened my strength in the way; he shortened my days.
24I said, O my God, take me not away in the midst of my days: thy years
are throughout all generations.
25Of old hast thou laid the foundation of the earth: and the heavens
are the work of thy hands.
26They shall perish, but thou shalt endure: yea, all of them shall wax old like a garment; as a vesture shalt thou change them, and they shall be changed:
27But thou
art the same, and thy years shall have no end.
28The children of thy servants shall continue, and their seed shall be established before thee.
In every instance, the bold-faced "
LORD" is Yahweh or Jehovah in the Hebrew.
Why is this important?
It's important because of what is said of the LORD, or Yahweh, or Jehovah in verses 25 through 27.
In other words, those verses are quoted in relation to Jesus in the New Testament.
Hebrews 1
10And, Thou, Lord, in the beginning hast laid the foundation of the earth; and the heavens are the works of thine hands:
11They shall perish; but thou remainest; and they all shall wax old as doth a garment;
12And as a vesture shalt thou fold them up, and they shall be changed: but thou art the same, and thy years shall not fail.
Again, this LORD, or Yahweh, or Jehovah is Jesus.