Bob Marley - Get Up, Stand Up

Get up, stand up, stand up for your rights
Get up, stand up, stand up for your rights
Get up, stand up, stand up for your rights
Get up, stand up, don't give up the fight

Preacher man don't tell me
Heaven is under the earth
I know you don't know
What life is really worth
It's not all that glitters is gold
Half the story has never been told
So now you see the light
Stand up for your rights

Get up, stand up, stand up for your rights
Get up, stand up, stand up for your rights
Get up, stand up, stand up for your rights
Get up, stand up, don't give up the fight

Most people think
Great good will come from the skies
Take away everything
And make everybody feel high
But if you know what life is worth
You would look for yours on earth
And now you've seen the light
You stand up for your rights

Get up, stand up (yeah, yeah)
Stand up for your rights (oh)
Get up, stand up (get up stand up)
Don't give up the fight (life is your right)
Get up stand up (so we can't give up the fight)
Stand up for your right (lord lord)
Get up, stand up (people struggling on)
Don't give up the fight (yeah)

We're sick and tired of your ism-schism game
To die and go to heaven in Jesus' name
We know and understand
Almighty God is a living man
You can fool some people sometimes
But you can't fool all the people all the time
And now we've seen the light (What you gonna do)
We gonna stand up for our rights

Get up, stand up
Stand up for you rights
Get up, stand up
Stand up for your rights
Get up, stand up
Stand up for your rights
Get up, stand up
Don't give up the fight

What message did Bob Marley give through this song actually?
Answer : Its very obvious. I'm sure everybody can think the meaning.