The how implies that somebody is going to give you a method, a recipe, which, if you practise it, will bring about understanding. Can understanding ever come about through a method? Understanding means love and the sanity of the mind. And love cannot be practised or taught. The sanity of the mind can only come about when there is clear perception, seeing things as they are unemotionally, not sentimentally. Neither of these two things can be taught by another, nor by a system invented by yourself or by another.