There are three main things that all Buddhas, including Gautama Buddha, preach. That is, not committing all sins, accumulating merit, and controlling the mind. The world is adapted to living beings according to a certain Dharma. That Dharma exists for a time as a source of Dharma energy because of the seven virtuous and wise people. Gradually, when such people are eliminated from human society, the Dharma energy and the ability of living beings to absorb it are eliminated. Hearing the Dharma is the main thing that creates Dharma energy. Virtuous and wise people are born from hearing the Dharma. The main purpose of the sermons presented on the "Dharmadeshana ධර්මදේශනා" YouTube channel is to distribute Dharma knowledge among people.