In John 14 Philip asked Jesus, "Lord, show us the Father." (Verse 8)
Jesus had been speaking of God in a distanced way all this time, and poor Philip thought that He was speaking of another person.
But notice Jesus' response.
He seemed puzzled when He said, "Have I been so long time with you, and yet thou hast not known Me, Philip?" (verse 9)
Jesus was saying that He Himself was the one that Philip was asking for.
One reason that Jesus so often spoke of God in the third person is that He did not want to appear unto men as God, but He wanted to appear as a man just like one of us, as we read in Philippians 2:5-8:
 Let this mind be in you, which was also in Jesus Christ:
 Who, being in the form of God, thought it not robbery to be equal with God:
 But made Himself of no reputation, and took upon Him the form of a servant, and was made in the likeness of men:
 And being found in fashion as a man, He humbled Himself, and became obedient unto death, even the death of the cross.
Jesus had a dual nature.
In the capacity of being fully man, He was distinct from God.
This is why we can see references to the God of Jesus Christ.
(Matt. 27:46, John 20:17 & Ephesians 1:17)
As a man, there were things He did not know (Mark 13:32), there were things He couldn't do (Mark 6:5), He could only be in one place at a time (John 16:7), He could be tempted (Hebrews 4:15), He could thirst (John 19:28), and He could die (John 19:33).
But He was also fully God and could be called such.
(John 20:28, 1 Timothy 3:16 & 1 John 5:20).