We have, at last, achieved our political emancipation. We pledge ourselves to liberate all our people from the continuing bondage of poverty, deprivation, suffering, gender and other discrimination. 

 

Never, never, and never again shall it be that this beautiful land will again experience the oppression of one by another.

 

The sun shall never set on so glorious a human achievement.

 

Let freedom reign. God bless Africa!

Explanation:

 

Mandela says that they had finally attained political independence. He also says that they would pledge to free all of their people from the shackles of poverty, hardship, pain, gender and other forms of prejudice. Speaking against oppression and discrimination, he says that there wouldn't never again would his wonderful land be subjected to the oppression of one by another. In continuing his fight against racial injustice, he is sure that the sun would never set on such a magnificent human accomplishment.

 

Meanings of difficult words:
 
Sl. No
Words
Meanings
1
ValleyA low area of land between hills or mountains, typically with a river or stream flowing through it
2
CrestThe top of a mountain or hill
3
RipeHaving arrived at the fitting stage or time for a particular action or purpose
4
DownpourA heavy fall of rain
5
ShowerA brief and usually light fall of rain, hail, sleet, or snow
6
IntimatelyIn a way that involves detailed knowledge
Reference:

National Council of Educational Research and Training (2007). First Flight. Nelson Mandela: A Long Walk to Freedom - Nelson Rolihlahla Mandela (pp. 16 - 23). Published at the Publication Division by the Secretary, National Council of Educational Research and Training, Sri Aurobindo Marg, New Delhi..