We usually see only the things we are looking for- so much so that we sometimes see them where they are not.

The past is always tense, the future perfect.

市场总是对的，而我总是错的。

如果你一直在学习，你就会拥有巨大的优势。

对事实进行分类并认识它们的顺序和相对重要性是科学的功能。