Alan Watts said, "If you get the message, hang up the phone. For psychedelic drugs are simply instruments, like microscopes, telescopes, and telephones. The biologist does not sit with eye permanently glued to the microscope, he goes away and works on what he has seen."
How do you know when it is time to pick up the phone again? What calls you back to sit with a certain medicine?
Every 3-6 months I seem to have a calling back for another look through the telescope. The grind of life takes a toll and while meditation and healthy lifestyle help prolong the positive effects each gaze into divinity provide, every so often I benefit from revisiting through indigenous medicine.
The type of medicine has been falling into place whenever it is time. Maybe eventually I will no longer feel a calling, but I continue to be spiritually curious for a deeper look into the unknown.