SPOILER ALERT:
It has always been about Graymatter.
The banality of being a family man and a strong part of the community cannot compare to the empire he started.
Walter resents his family - they are a liability to his success.
They represent his weakness: love, and love will leave you vulnerable.
As GrayMatter grew, his quality of life began to shrink.
The opposing forces and contradictions are a constant.
People normally ask: "how can he say he still loves his family?" Well, he's trying to find a balance between the two.
He can justify his pride and evil acts with family, just as he tried to justify leaving GrayMatter with family.
Family is a tool to unlock the little bit of humanity inside of him. Once he loses that, there is nothing left to balance.
There are no more opposing forces and he can finally admit what he is..
"Walter is a genius with a sweetheart. He gave all he had for this company. Definitely an integral part of the beginnings.It was such a sweet gesture to sell his stock so he could buy his wife a wedding ring. We missed him, but I was so happy to see him settle with the right person. He and I had a romantic past, but that's all over. The money was never important to him - it was always helping others, the company, his family. HELPING OTHERS. NEVER HIMSELF. He left very early, so we can't attribute all our success to him, but his spirit and love for chemistry permeates in us all."
This is what has been screaming in his head the entire time.
The remarks on the television brought it all to the surface.
He's proved that there is much more to him than a clean-cut meek chemistry teacher.
This is going to be a very interesting finale.