I have not seen a rich man coming to the public to preach or teach people how to become rich. But those who are poor or middle class or the educated elites would interview the rich and the wealthy people then write motivational books for the research they have carried out. Op is just trying to motivate people here but we also have read those books and motivated ourselves.

Op you don't have to create thread for this but you can use those motivational quotes for references. Though it is good to look other people success to motivate yourself but reading and quoting those books without action is useless.