Isaiah 9:6 says: “For unto us a child is born, unto us a son is given: and the government shall be upon his shoulder: and his name shall be called Wonderful, Counsellor, The mighty God, The everlasting Father, The Prince of Peace.”
Some believe that this verse is teaching that Christ is God the Father. If this is so, how can he be the Son? And if he is both Father and Son, how can there be a trinity, for a trinity is composed of three. This verse certainly does not support a Trinity doctrine. And, as we compare Scripture with Scripture, we can be sure that neither does it support the “Jesus only” doctrine.
Jesus is referred to as the Father, not the Father of himself, but the Father of the children which his Father has given him.
In Hebrews 2:13, Paul quoted from Isaiah 8:18 and applied it to Christ. Here Christ says, “Behold, I and the children whom the LORD hath given me.”
Many Trinitarians have said that the word everlasting in Isaiah 9:6 means that Christ always was and that he never had a beginning. However, when the term “everlasting life” is applied to us they all admit that it simply means that we will live forever in the future, not that we have always been in existence.
Notice also that Isaiah 9:6 says that “his name shall be called… The mighty God.” Some use this phrase to mean that Christ is the supreme God. This might be a good argument if the verse had referred to Christ as the Almighty God, but it uses the term mighty God. In the Bible we read of mighty men, but never of Almighty men. It is certainly appropriate to refer to the Son as mighty, for he is powerful. It is also appropriate to refer to him as God, for the Most High God himself refers to his Son as God in Hebrews 1:8. Therefore the terms “everlasting Father” and “The mighty God” can rightly apply to the Son.