In Christian mythology, the Holy Grail was the dish, plate, cup or vessel that caught Jesus’ blood during his crucifixion. It was said to have the power to heal all wounds. A theme joined to the Christianised Arthurian mythos relates to the quest for the Holy Grail.
The things that happen on the invisible plane are incredibly more important then what occurs on the empirical plane.
You don’t acquire wisdom through study alone, just knowledge; only when knowledge and experience fertilizes each other does wisdom sprout. Only through living do you come near God.As an example: If someone studies the grail lore and as a result they are inspired to work towards the evolution of all humanity in some special form of service – perhaps something like Doctors Without Borders or by operating a homeless shelter – then the lessons learned from the studies are translated into a real-world expression of the spiritual lessons they acquire internally and all of the studies are worth what results.
Different people receive spiritual messages in different ways that are adapted to their own soul personality. For now the development on Earth are controlled through ideas, and the strength of these ideas is shown through how many years they live, fe. Sct. Paul had an extremely strong impact on the European history through Christianity, and the idea about Grail has not the same strength, but is still going strong, and that is only possible because of it’s inherent wisdom. The Grail idea are in the spirit of Sct. John.
You can say that it only comes from men, and that is right, but they are inspired from the spiritual world on the precise point in time where it could manifest the strongest, both at that time but also for a later times. As time goes ideas dies out, so new ideas pops up in the physical world, maybe building on older traditions, but giving new energy furthering the development of mankind.