Talk:Visualization/@comment-25768118-20141219180134/@comment-90.201.22.247-20141219223117

Yes, it can be a vivid image, but you can simply visualise e.g. an energy ball being created between your hands, without visualising anything else, and it would still work.

How hard? That depends on a person, it might take some practice, but it's easy once you get a hang of "imagining" things, then you simply add your intent and will to it.