Misc: How many umbrellas are lost on the London Underground each year?

Questions

"------------- is a relentless master. It has no present, only the past rushing into the future. To try to hold fast is to be swept aside."- John fitzgerald Kennedy?

"---------- is a vast early warning system."- Norman Cousins?

"--------------- is the version of past events that people have decided to agree upon."- Napoleon?

"Hold fast to -----------, for if dreams die, life is a broken bird that cannot fly."- Langston Hughes?

ZZZ"Home is where the --------- is."- Anonymous?