Sentence:  Inspiration is my <WSD>drug</WSD>. Such things as spirituality, booze, travel, psychedelics, contemplation, music, dance, laughter, wilderness, and ribaldry — these have simply been the different forms of the <WSD>drug</WSD> of inspiration for which I have had great need ... 
Meaning of the word marked with <WSD> tags:  Anything, such as a substance, emotion(,) or action, to which one is addicted.