i really want to understand if the trinity is a true doctrine, but none of this post use scriptures to back the claims. Please use scripture.
You need to realize that the doctrine of the Trinity is based upon both scripture and the writings of the early Christians and has been defined by the Catholic Church based upon both of those sources.
If you want scripture…I can supply it .
The earliest references that imply the Trinity are:
Genesis 1:1-2 reads
1 In the beginning God created the heavens and the earth.
2 The earth was without form and void, and darkness was upon the face of the deep; and the Spirit of God was moving over the face of the waters.
Here we see the Holy Spirit as active in creation and, because of that we see that he is God.
Then in Genesis 1:26 we see, “
26 Then God said, “Let us make man in our image, after our likeness; and let them have dominion over the fish of the sea, and over the birds of the air, and over the cattle, and over all the earth, and over every creeping thing that creeps upon the earth.””
Notice please the plural, “we”. Was God talking to Himself? Not at all…
Notice the following…
in Deuteronomy 6:4 we see, "“Hear, O Israel: The LORD our God is one LORD;”
Now some people who deny the Trinity seek to use this verse to support their case, but there is a serious problem with that in the Hebrew because the word “one” above is the Hebrew word “echad” and is the very same word used in Genesis 2:24 which reads, “Therefore a man leaves his father and his mother and cleaves to his wife, and they become one flesh.”
Now it is pretty obvious that in the 2nd passage the meaning is that two are one unity, which shows us that we need to understand that that same plurality and unity is found in God. It does not prove the Trinity, but when taken in context of other passages where we find God spoken of (by Jesus no less) as “the Father” and “the Holy Spirit” (who can be blasphemed against. Since only God can be blasphemed, what does that tell us?) and then we have the 1st chapter of John’s Gospel where it says “
1 In the beginning was the Word, and the Word was with God, and the Word was God.
2 He was in the beginning with God;
3 all things were made through him, and without him was not anything made that was made.” and here it is speaking quite plainly about Jesus Christ as being active in creation and we have already seen that the Holy Spirit was also involved.
Finally, we see Our Lord Jesus Christ telling us plainly “I and the Father are one.” in John 10:30 and John 17:21 where He plainly states that he is in the father and the father is in Him. Since all of these were active in creation then that makes a strong case for the Trinity.
Remember also that the great commission in Matthew 28:19 says, “Go therefore and make disciples of all nations, baptizing them in the name of the Father and of the Son and of the Holy Spirit,” which makes it very clear indeed, else why would that be one of the last things that Our Lord taught before the Ascension?
There is a great deal more, but I believe these are compelling.
You might also make a careful study of the following: