Because when you see a sign, symbol, sound, smell in a spiritual setting, you can use the Liber 777 and the model of the kabbalistic and magickal correspondances as a tool to communicate these associations, not only to other people but yourself too. When doing rituals you need to keep these associations.
The more work you do, the more associations you need to control.
The benefit: you can actually take control on how you think how we feel and our psychological state by manipulating objects in our environment.
“It’s gruntwork – and it PAYS OFF if you actually do it”.