One of the easiest ways to demonstrate the fallacy of the claim that Jesus was a created being is to turn to John 1:3: "All things came to be through him [the Word], and without him nothing came to be" (New American Bible, revised edition).
The Greek word choris, which is here translated "without," means "separately" or "apart from," and it shows that the Word is the instrumentality by which all things came into being. (Some Bible versions read, "and without him not even one thing came into being.")
So if the Bible says that nothing or not even one thing came into being apart from the Word’s creative activity, how is it that the Word himself could have been created? If that were true, he would be "one thing" which came into being apart from himself, and this fact would contradict John 1:3.