The ultimate goal of machine learning is to make machines that can learn from experience and improve their performance over time.

译文：凡是一个人要做一件事情，就必须把全部的精神都集中在这件事情上，从开头到结尾都不能松懈，不可以看到别的就改变主意，做着这件事又想着那件事，坐在这座山上又望着那座山。一个人如果没有恒心，一辈子都不会有什么成就。

The ideas I had about supernatural beings came to me the same way that my mathematical ideas did. So I took them seriously.