'You can give a fool a thousand intellects, but the only one he will want is yours,' says an Arabic proverb.
When a wise investor starts planning his portfolio, he notices that his neighbor (neighbor = anyone who wouldn't lose anything if you lose your money) is there, spying. He likes to give advice on when to sow actions, when to fertilize thoughts, and review.
If he only listens to what his neighbor is saying, he will end up creating something that is not his; a portfolio he is tending will be his neighbor's idea. But a true warrior knows that every portfolio has its own mysteries, which only he himself can unravel. That is why he prefers to concentrate on his beliefs, his likings, market cycles & the momentum.
He knows that the fool who gives advice about someone else's garden is not tending his own plants.