What does the last sentence mean?
Buffett agreed that he is big on reading everything in sight and recommended good investors should read everything they can.
In his case, he said that by the age of 10, he’d read every book in the Omaha public library on investing, some twice! Fill your mind with competing ideas, and see what makes sense to you.
Then you have to jump in the water—take a small amount of money, and do it yourself. He joked that investing on paper is like reading a romance novel versus doing something else.