Proof That There Is A Trinity, Father, Son and Holy Spirit

  Ever since I can remember growing up in the Catholic Church I was taught about the Trinity. Yes the Father, Son and Holy Ghost. I have heard many people say oh there isn't any Trinity. Well I believe they are wrong in not believing in the Trinity. I believe the proof is in the Old Testament and the New Testament. All we have to do is do some reading and it becomes very clear.
  In Genesis Chapter 1 Verse 26 we read,  Then God said, "Let US make man in OUR image, according to Our likeness" .  What we see is that God is using Plural Pronouns with the Us and Our. So why would he use plural pronouns if there wasn't more than one person. We see all through Genesis verses about God and the Spirit Hovering over the waters for example. Then God talks about the light of the world and we see in other scripture where Jesus is referred to as the light of the world. There are many other verses that give proof of the Trinity throughout the Old Testament. Here is a link to some excellent reading http://evidencetobelieve.net/the-holy-trinity-in-scripture/ .
  One of my favorites is when John the Baptist is baptizing people and Jesus comes to him to be Baptized. We see Jesus and hear God say this is my son in whom I am well pleased and John also sees the heavens part as the Holy Spirit in the form of a dove comes down upon Jesus. Right there we see the three persons of the Trinity. Here is a link to some interesting proof from the Old Testament about the Trinity http://www.biblicalcatholic.com/apologetics/a111.htm . Also here is some interesting information from the Catholic Encyclopedia http://www.catholic.org/encyclopedia/view.php?id=5222 . My advise about any subject is to read what was written by the particular religion so you get their proper view and not something that is not correct due to someones incorrect interpretation .
  
Here is a small paragraph below the video with some very interesting reading about the Catholic Church. I would check out the website at this link to read for yourself http://www.olrl.org/apologetics/cathansr.shtml .

                            




"Why do Catholics believe that God is three Persons, called the Holy Trinity? How can God be three Persons and still be one God?
  Catholics believe there is one God consisting of three distinct and equal divine Persons – Father, Son and Holy Spirit – because on numerous occasions God has described Himself thus. The Old Testament gives intimations that there are more than one Person in God. In Genesis 1:26, God says, "Let us make man to our image and likeness." In Isaiah 9:6-7, God the Father revealed the imminent coming into the world of God the Son. In Psalms 2:7, we read, "The Lord hath said to me: Thou art my son, this day have I begotten thee." And in the New Testament, God reveals this doctrine even more clearly. For example, at the baptism of Jesus Christ, the Holy Spirit appeared in the form of a dove, and the voice of God the Father was heard: "This is my beloved Son, in whom I am well pleased." (Matt. 3:16-17). In Matthew 28:19, God the Son commanded the Apostles to baptize "in the name of the Father, and of the Son, and of the Holy Ghost." And in 1 Cor. 12:4-6, the Bible refers to God with three names: Spirit, Lord, and God – corresponding to the Father, the Son, and the Holy Spirit. Three divine Persons in one Godhead may be incomprehensible to the human mind, but that is to be expected. How can man fully comprehend God's infinite make-up when he cannot fully comprehend his own finite make-up? We have to take God's word for it. Also, we can satisfy ourselves as to the feasibility of God's triune make-up by considering various other triune realities. The triangle, for example, is one distinct form with three distinct and equal sides. And the clover leaf is one leaf with three distinct and equal petals. There are many physical trinities on earth, therefore a Spiritual Trinity, who is God in Heaven, is not against human reason – it is simply above human reason."
  So as you can see there are tons of information on the Trinity in the Catholic Church as well as other religions that believe in the Trinity. If you are looking for a website with good information on the Trinity and when it started check out this website link at Catholic Answers http://www.catholic.com/tracts/the-trinity . Many people believe that the Trinity was invented by the Catholic Church. Even if it was started by the Catholic Church the proof of the Trinity is shown throughout the Old Testament and the New Testament. It very well is a supernatural mystery that we will only be able to fully understand when we enter the Kingdom Of Heaven.
  If you are looking to purchase books on the subject or any subject check out the amazon store below. 
  Thank You for reading and God Bless.