The diamond is worth so much that it would feed him and all his descendants for several generations. On the ground, Ramu has decided after some pondering that he should not be angry about his life or blame God because he still has a few things to be grateful for, such as retaining his sight at such an old age.
The diamond's immense value would provide sustenance for Ramu and his descendants for many generations.  Ramu, after thoughtful consideration, chooses not to harbor anger about his life or blame God, recognizing he still has things to be grateful for, including his remaining sight at a ripe old age.