Purity of heart is to will one thing.

好奇心和毅力可以改变世界。

A majority of life's errors are caused by forgetting what one is really trying to do.

译文：一句话不对就容易把天惹塌，话没有经过多次思考就不要说出口。赏析：在说出每一句话前，我们都要深思熟虑后才能出口，否则就会中伤别人。