Their happiness, sadness, ambitions, economical, social, political and love life. He puts his characters within white space arranged to suit their condition, a space that matches their worries. Through this creation he produces a space either in tune with the characters or rather strained and tense.

Diab's paintings remain grim and grey though. He depicts screaming faces, dark monsters and frightening animals. For him, a painting doesn't have to be beautiful, what matters, is that it reflects his feelings.