Learn to think

＂I will think of it.＂ It is easy to say this.【小题1】 We can not see our thoughts, or hear, or taste, or feel them; and yet what mighty power they have!

Sir Isaac Newton was seated in his garden on a summer’s evening, when he saw an apple fall from a tree. 【小题2】Later, he discovered how the earth, sun, moon, and stars were kept in their places.

【小题3】 He began to think; he wanted to find out why the steam in the kettle moved the heavy lid. From that time he went on thinking and thinking. When he became a man, he improved the steam engine so much that it could, with the greatest ease, do the work of many horses. 【小题4】

A man named Galileo was once standing in the cathedral of Pisa, when he saw a chandelier swaying to and fro (来回地). This set him thinking, and it led to the invention of the pendulum.

Boys, when you have a difficult lesson to learn, don’t feel discouraged, and help yourselves before asking someone to help you. 【小题5】