UnScramble this Word: e i c e d i f t?

Questions

"A billion here, a billion there - pretty soon it adds up to real ---------."- Senator Everett McKinley Dirksen (1896 - 1969)?

"--------- aren't exactly people...they're a whole lot of people trying to be one person."- F. Scott Fitzgerald?

"---------- should be read, but neither seen nor heard."- Daphne Du Maurier?

"--------- is turning one's worst moments into money."- J.P. Donleavy?

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