Lucifer is in his office in the underworld. He excuses himself to Shaire to return to hell to have alone time. His mind is crowded with many ridiculous things and negative ideas, making him irritated. He needs to think on his own to clarify and figure everything out.
Being a devil is kind of hard. Take note that he's the king of the underworld, and being superior in the world of fire is difficult. They may think that demons and other bad entities have the easiest job because they only need to seduce, commit a sin, and pester humans. It is simple coz it is their natural behavior, or that's what they are made of but, wrong. Demons have emotions and their own opinions, too. They know the good and the bad.
In Lucifer's case, he was having a hard time deciding if he will going to his Father
