Not a fact at all.

True Christianity (Orthodox Christianity) has its roots in Judaism (not the modern, Messiah rejecting, demonic Judaism of today), which existed hundreds of years before Socrates even lived. 

There are some Early Church Fathers that used the philosophical language popular during those times to prove Christianity is true to the Greeks/Gentiles even by their own lines of philosophical argumentation. 

The purpose of life is union with God, our Creator. Christianity is not a relativistic religion; on the contrary, there are specific, dogmatic beliefs that Christians must believe about God or else they are a heretic (whether in knowledge or ignorance). 

For example, to be baptized into the Orthodox Church you must confess the Nicene-Constantinopolitan Creed:

“We believe in one God, the Father Almighty, Maker of heaven and earth, and of all things visible and invisible;

And in one Lord Jesus Christ, the Son of God, the Only-begotten, Begotten of the Father before all ages, Light of Light, Very God of Very God, Begotten, not made; of one essence with the Father; by whom all things were made:

Who for us men and for our salvation came down from heaven, and was incarnate of the Holy Spirit and the Virgin Mary, and was made man;

And was crucified also for us under Pontius Pilate, and suffered and was buried;

And the third day He rose again, according to the Scriptures;

And ascended into heaven, and sits at the right hand of the Father;

And He shall come again with glory to judge the living and the dead, Whose kingdom shall have no end.

And we believe in the Holy Spirit, the Lord, and Giver of Life, Who proceeds from the Father, Who with the Father and the Son together is worshipped and glorified, Who spoke by the Prophets;

And we believe in one, holy, catholic, and apostolic Church.

We acknowledge one Baptism for the remission of sins.

We look for the Resurrection of the dead,

And the Life of the age to come. Amen.”