If you would have knowledge, knowledge sure and sound, teach. Teach your children, teach your associates, teach your friends. In the very act of teaching, you will learn far more than your best pupil.
Knowledge is relative; you possess it in degrees. You know more about reading, writing, and arithmetic than your young child. But teach that child at every opportunity; try to pass on to him all you know, and the very attempt will produce a great deal more knowledge inside your own brain.
From time immemorial it has been commonly understood that the best way to acquire knowledge was to read. That is not true. Reading is only one way to knowledge, and in the writer’s opinion, not the best way. But you can surely learn from reading if you read in the proper manner.
What you read is important, but not all important. How you read is the main consideration. For if you know how to read, there’s a world of education even in the newspapers, the magazines, on a single billboard or a stray advertising dodger. The secret of good reading is this: read critically!
To know it — write it! If you’re writing to explain, you’re explaining it to yourself! If you’re writing to inspire, you’re inspiring yourself! If you’re writing to record, you’re recording it on your own memory. How often you have written something down in order to be sure you would have a record of it, only to find that you never needed the written record because you had learned it by heart!
The men of the best memories are those who make notes, who write things down. They just don’t write to remember, they write to learn.