Davros and The Doctor in “The Witch's Familiar”

There is a question, Doctor. One I have longed to ask.

Yeah, well, if you're going to put your hand on my knee, it isn't going to go well.

Why did you leave Gallifrey?

Well, because I did.

You stole a TARDIS, and ran and ran. Why?

It's a boring place, Gallifrey. I was going out of my mind.

Yet you long to return.

Ah, well, I'm inconsistent.

But it is always the same lie.

What lie?

You weren't bored. No one runs the way you have run for so small a reason.