You can't have the peaks without the valleys.
My grandmother used to say this and as I've gotten older, I appreciate it more.
"When Sears invents a vacuum cleaner you can ride around on, I'll start vacuuming." - Roseanne (it might not be exactly this, a paraphrase, but close.)
"Real cooks don't use recipes, we cook from the heart." - Marie Barone (Everybody Loves Raymond.)
"There are some days when I myself think that I'm over-rated...but not today." - Meryl Streep.
"Everything I sing, I mean." - John Lennon.
"Whether you think you can or think you can't, either way, you're right." - Henry Ford.
"If you're going through hell, keep going." - Winston Churchill.
"Never give up." - Winston Churchill.
(When asked what do you think when you see yourself in the mirror every morning or something like that): "I don't have that problem, darling, I never wake up until the afternoon." - Rita Hayworth.
"May you live to be 100, and may the last voice you hear be mine." - Frank Sinatra.