John 14: 8-14, Ask!

Jesus has been speaking to his disciples, telling them how they should live in his absence. Judas has left the room to betray him.

Thomas asks a good question.  "Where are you going?"  The disciples thinks Jesus is going into exile. But Jesus is speaking metaphorically, about an eternal kingdom, of which the path is simply through him.

John 14: 8-11, I am in the Father and He is in me
Philip said, “Lord, show us the Father and that will be enough for us.”

9 Jesus answered: “Don’t you know me, Philip, even after I have been among you such a long time? Anyone who has seen me has seen the Father. How can you say, ‘Show us the Father’? 
10 Don’t you believe that I am in the Father, and that the Father is in me? The words I say to you I do not speak on my own authority. Rather, it is the Father, living in me, who is doing his work. 
11 Believe me when I say that I am in the Father and the Father is in me; or at least believe on the evidence of the works themselves. 

Both Thomas and Philip are fixating on a literal journey and Jesus, with a hint of frustration, explains that he is (or represents) the Father.

This is a strong theme of the gospel of John; Jesus repeatedly identifies himself with God.

John 14: 12-14, Ask!
Very truly I tell you, whoever believes in me will do the works I have been doing, and they will do even greater things than these, because I am going to the Father. 
13 And I will do whatever you ask in my name, so that the Father may be glorified in the Son. 
14 You may ask me for anything in my name, and I will do it.

Is this promise, "Ask in my name", just to Philip and the disciples? Or is it universal?  What does it mean?  It does come with implied conditions: the answers are part of God being glorified.