We've learned that change is necessary for growth.

最大的恶和最严重的罪行是贫穷。

世界是一本伟大的书，从不离家的人只读了一页。

The speech we hear is an indication of that which we don't hear. It is a necessary avoidance, a violent, sly, anguished or mocking smokescreen which keeps the other in its place.