Caapi tea or sublingual caapi alkaloids, 30 minutes before the spice experience (in whatever form) prepares the "temple". The experience of "spirit" seems deeper, more 3- and 4-dimensional, and more memorable. Write down notes of thoughts and feelings on the way up and down, as they come to you. Writing helps the neural imprinting for better recall and integration. A definite preference of caapi over rue, subjectively speaking.