Misc: what peanuts character has a brother named spike?

Questions

"A ------------ is one of the only pieces of evidence we have that people are still thinking."- Jerry Seinfeld (1954 - )?

"A ---------- is a person who works hard all his life to become known, then wears dark glasses to avoid being recognized."- Fred Allen (1894 - 1956)?

"------------- - a group of men who keep minutes and waste hours."- M. Berle?

"------------ is perhaps the most equally divided, but surely the most underemployed talent in the world."-Christine Collange?

"------------ is the collection of prejudices acquired by age eighteen."- Albert Einstein (1879-1955)?