The action of hashish is as varied as life itself and seems to be determined almost entirely by the will or mood of the 'assassin,' and that within the hedges of his mental and moral form. I can get fantastic visions, or power of mind ? analysis, or spiritual exaltation, or sexual excitement of various kinds, or ravenous hunger, or vigor of imagination, whichever I please, absolutely at will, on a minute dose of the Parker Davis extract. This is simply because I have discovered the theory and perfected the practice of the instrument.