I didn’t get “Don’t go in the wrong light” from this. I think the point he’s making is you will never know if you’re following the right light. If you knew it was the wrong light then you’re making a decision to follow it but its more depressing to think you’re doing the right thing when in the end its wrong.

It just seems Donald is more doubting and questioning his own path.

While that’s almost the same as “Don’t go into the wrong light” I just feel it explains more.