In the last part of the quote, he is simply saying that we should be teaching children to perfect the job their parents are doing, whether that's farming or some other not interesting job. We shouldn't be teaching all the children to grow up and be rap artists, because there will be no one to do the rest of the work.

In the second part of the quote, he's saying that we should not be looking for more people like artists, musicians, politicians, and preachers, because there are plenty of those already.

This quote is somewhat misunderstood. In the first part of the quote, he is saying that he wishes people did not try to force him to accepting standards. He was saying he dreams of people allowing him to help the world and people in his own way.

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