Translation: Update index.md (#1633)

Chapter 12 of "divide and conquer

Author: K3v123

Diff for: en/docs/chapter_divide_and_conquer/index.md

@@ -4,6 +4,6 @@
 
 !!! abstract
 
-    Difficult problems are decomposed layer by layer, each decomposition making them simpler.
+    Difficult problems are decomposed layer by layer, with each decomposition making them simpler.
 
-    Divide and conquer reveals an important truth: start with simplicity, and nothing is complex anymore.
+    Divide and conquer unveils a profound truth: begin with simplicity, and complexity dissolves.