Looking for some awesome quotes

"Every life is a pile of good things and bad things. The good things don’t always soften the bad things, but vice versa, the bad things don’t always spoil the good things and make them unimportant.” - Doctor Who (11th Doctor)

"Yes" - Spartacus

Death “Perhaps, if you knew you were going to die, your senses crammed in as much detail as they could while they still had the chance...”
―Terry Pratchett (Truckers (1990))

Arrival & Farewell “Coming back to where you started is not the same as never leaving.”
―Terry Pratchett

la cumbia me divierte y mesita

Difficult times "Wishes won’t be granted by just thinking about them"
-- Sekai Saionji character in an anime that I would not recommend people to watch

"Same shit, different day!" - by Stephen King, Dreamcatcher

Bump~

"You're under no obligation to be the same person you were 5 minutes ago." - Alan Watts

"It's never too late to be whoever you want to be. I hope you live a life you're proud of, and if you find out that you're not, I hope you have the strength to start over." - F. Scott Fitzgerald

responds again

You could also have a look at the quotes from AntiChamber. It's a puzzle game and you get hints in the form of quotes or just as reward for finishing a puzzle. There's some cool ones like...

• "Taking the first step can be harder than the rest of the challenge."
• "The end may come before we were ready to get there."
• "What appears impossible may have a very simple answer."
• "A few steps backwards may keep you moving forwards."

Check them out here (just text) or here (with their corresponding images)

Luck is nothing but preparation meeting opportunity

“I believe that life is a game, that life is a cruel joke, and that life is what happens when you're alive and that you might as well lie back and enjoy it.”
― Neil Gaiman, American Gods

"I started out with nothing and I still have most of it left"

Seasick Steve

And "War does not determine who is right, only who is left"

Unknown

"Bump!"
-sesito71

''The secret of gettting things done is to act!''

''the more perfect a thing is the more susceptible to good and bad treatment it is''

''The darkest places in hell are reserved for those who maintain their neutrality in times of moral crisis.''

Dante Alighieri : The Divine Comedy

Also I really like this quote bUT can't figure out what section to put it in >_<
Putijg it here anyways

The fake is of far greater value. In its deliberate attempt to be real, it's more real than the real thing. Deishū Kaiki said- (Nisemonogatari)

BIONICLE quotes, anybody?

Farewell:
"The time has come. All journeys must end, but this one heralds a new beginning as well. All that has gone before has only served to give birth to this new day."
— Mata Nui (Comic 7: Rebirth)

Death:
"There are a thousand ways I could destroy you right now. And 941 of them hurt." - Teridax (Time Trap)

Difficult times:
"Where wisdom and valor fail, all that remains is faith. And it can overcome all.” - Tahu (Mata Nui Online Game)

My favorite science quote:

"Through space the universe encompasses and swallows me up like an atom; through thought I comprehend it."
Blaise Pascal

Difficult times:
He had a baseball bat, and I was tied to a chair. Pissing him off was the smart thing to do. - Max Payne

Death:
No begging, no bribes. She knew better. Honor among killers; we who are about to die. Both of us knew how this would end: in pain and suffering. - Max Payne

Luck:
You'd find that Lady Luck was really a hooker, and you were fresh out of cash - Max Payne

And last but not least:
They were all dead. The final gunshot was an exclamation mark to everything that had led to this point. I released my finger from the trigger. - You Know Who

Yeah, played it again lately, this game is a mine of a great quotes.

“For the mystery of human existence lies not in just staying alive, but in finding something to live for.” Fyodor Dostoyevsky
Not sure if it's one of your categories (maybe celebrating life), but it's my favorite quote. The Brothers Karamazov is such a great book. Everyone should read it, at least once.

Science:
"One of the great commandments of science is:
'Mistrust arguments from authority.'" -- Carl Sagan

Death
"Even if Your souls disappears, your wishes and curses remain in this world. You will roam around the world as information and gradually changes. Eventually, even you own self is altered."
-Nagisa Kaworu, RoE 3.0

"We need more monkeys!" - Toy Story

Science:
Never argue with stupid people, they will drag you down to their level and beat you with experience.

• Mark Twain -

Ehm... Arrival? :P
Mic check: "1, 2, FUCK YOU!" xD

Death:
"You're all gonna die. Only question is how you check out. Do you want
it on your feet, or on your fuckin' knees, begging? I ain't much for
begging." -- Dillon, Alien^3