The purpose of meditation is to gradually elevate the mind to its highest possibility of unconditioned peace and love. There are various rungs that a meditator must climb in this process. It begins with studying or listening to the right knowledge. The test of rightness is that it is experientiable and substantiable by each and everybody. If it is not and if things appear to be mysterious, there could be something wrong or very ordinary that is being taught. The highest knowledge is also the simplest one. There is nothing esoteric about it.