The song, my friend, is playing in my head

I travel by train to go to work. Sometimes I have written here about people who take the train to go to work. To them, once more, to each of them, I dedicate this blog today.
Yesterday night, before going to bed, having a cigarette in the bathroom, digesting all the dantesque images I had seen and figures I had heard, this song suddenly started playing inside my head. It's still in my head this morning, in some musical background of my brain. You can read it, and try to play it in your heads too.

How many roads must a man walk down
Before you call him a man?
Yes, 'n' how many seas must a white dove sail
Before she sleeps in the sand?
Yes, 'n' how many times must the cannon balls fly
Before they're forever banned?
The answer, my friend, is blowin' in the wind,
The answer is blowin' in the wind.

How many times must a man look up
Before he can see the sky?
Yes, 'n' how many ears must one man have
Before he can hear people cry?
Yes, 'n' 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.

How many years can a mountain exist
Before it's washed to the sea?
Yes, 'n' how many years can some people exist
Before they're allowed to be free?
Yes, 'n' how many times can a man turn his head,
Pretending he just doesn't see?
The answer, my friend, is blowin' in the wind,
The answer is blowin' in the wind.