Keep in mind that psychedelic drugs are not the only keys to our unconscious minds; they cannot be used for learning and growth by everyone. There is no single drug or dosage level that will benefit all explorers equally. And it cannot be said too often that what is being experienced in the use of a psychedelic drug or visionary plant does not come from the ingested chemical components, but from the mind and psyche of the person using the compound. Every such drug opens a door within the user, and different drugs open different doors, which means that an explorer must learn how to most safely and successfully make his way through each new inner landscape. This takes time and should be done with the guidance of a veteran explorer, as if the case, ideally, with all deep emotional and spiritual explorations.
All of the above cautions aside, these tools – the psychedelic drugs and plants – offer a much faster method than most of the classic alternatives for the accomplishment of the goals we seek: conscious awareness of our interior workings and greater clarity as to our responsibilities towards our own species and all others with whom we share this planet.
–Alexander T. Shulgin