"In the Beginning Was the Word" - The Pre-existence of Christ
No. 13 - The Word Became Flesh - Philippians ch.2 [final in series]
Summary: If we want to appreciate something of what took place when "the Word became flesh" (John 1:14), we should familiarise ourselves with the words of Philippians chapter 2 (see below), where humility is exemplified in the person of Christ.
For further reading, see the article "Was Christ Still God When He Died?"