Overview
The Christological argument for the existence of God, which exists in several forms, holds that if certain claims about Jesus are valid, one should accept that God exists. There are three main threads; the argument from the wisdom of Jesus, the argument from the claims of Jesus as son of God and the argument from the resurrection.
Argument from the wisdom of Jesus
The essential structure of this argument is as follows:
The character and wisdom of Jesus is such that his views about reality are (or are likely to be) correct.
One of Jesus' views about reality was that God exists.
Therefore, the view that God exists is (or is likely to be) correct.
Some forms of evangelism take this approach. Potential converts are introduced to Jesus as a historical character and the merits of Jesus' teachings are discussed. In such a context, the historicity of Jesus is a crucial factor in assessing the argument.
The principal objections to (1) are the suggestions that:
The reports of Jesus' character in the Bible are not reliable.
Jesus' views about reality are not (or not likely to be) necessarily correct. Bertrand Russell, in his essay "Why I Am Not a Christian", criticized Jesus' personal character and philosophical positions on various grounds.
Even supposing that Jesus was correct, wise, and knowledgeable about a great many things does not imply that he was knowledgeable about everything. A deep knowledge of moral philosophy and the iniquities of the human condition, for example, do not necessarily imply any valid expertise on astrophysics, Phoenician literature, or the literal existence of God.
From Wikipedia (CC BY-SA 4.0).