[He hates to say it, but she needs to know. She needs to be aware that it might not be that easy.]

My machine only opened up windows. I never created a door.

[As he walks, though, he keeps talking.]

That was Rosalind's work. Comstock's backing, his repayment for Columbia. I never had that, so I never created what she did. Nothing so grand.

But I think I can. It may take me quite some time. I don't have any of my books, my notes, my equipment. I'm back at square one with only what remains in my head, nothing I can hold in my hand.

It... will take time.