" Ayahuasca can heal, but it an also be used to kill,' Carlos continues to translate for Juan... The key is remaining humble, being a servant of ayahuasca, not a master. 'Give yourself to the benefit of others, to God,' Juan says, his eyes daring over us, reading our energies. 'You must have a purpose to help other people, a desire to hep others. If you have a pure heart, a humble mind, and faith in your soul--then the Science will open up to you and show you its wonders. "