The name Word bestowed upon the Son of God reveals better than any other name the mystery of the inner relationship between the First and Second Persons of the Holy Trinity, God the Father and God the Son. A thought and a word are distinct from each other in that the thought dwells in the mind, whereas the word is the expression of the thought; yet the two are inseparable. The thought does not exist without the word, nor does the word without the thought. A thought is like a word which is concealed within, and a word is that which gives expression to the thought. The thought takes the form of a word to convey the content of the thought to its hearers. Looked at in this way, the thought, being an independent principle, is the father of the word, and the word is the son of the thought. The word cannot exist prior to the thought, yet it does not originate from without; it comes from the thought and remains inseparable from the thought. Similarly, the Father, the supreme and all-encompassing Thought, produced from His bosom the Son, the Word, His first Interpreter and Herald.
St. Dionysius of Alexandria
The Logos, 230-265 A.D.