My favorite artist of all time is the great Bob Dylan, on of his all time greats is from Blowin' in the Wind:

Yes, and how many times must a man look up
Before he can see the sky?
Yes, and how many ears must one man have
Before he can hear people cry?
Yes, and how many deaths will it take till he knows
That too many people have died?
The answer, my friend, is blowin' in the wind
The answer is blowin' in the wind

Dylan was saying that the answer to these questions are out there, it just takes people getting together and finding them

Honorable mention to a Modest Mouse lyric I think about a lot: 

In this life that we call home
The years go fast and the days go so slow
The days go so slow

Sometimes life just feels like this, you go by day by day waiting for something and then suddenly it's 10 years later. Depressing but reality sometimes