Not the author, for me lisp is the only langues I can write in pen and paper, and I can think the code as simple a different mathematical notation, real lisp is

Not the author, for me lisp is the only langues I can write in pen and paper, and I can think the code as simple a different mathematical notation, real lisp is little different than that but you can check the code and retry the part that works different than you expected, make me work in different level of abstraction than opp programming.