Sentence:  A convert's enthusiasm for his new religion is greater than that of a person who is born in it. Vegetarianism was then a new cult in England, and likewise for me, because, as we have seen, I had gone there a convinced meat-eater, and was intellectually converted to vegetarianism later. Full of the <WSD>neophyte's</WSD> zeal for vegetarianism, I decided to start a vegetarian club in my locality, Bayswater. I invited Sir Edwin Arnold, who lived there, to be Vice-President. Dr. Oldfield who was Editor of the "The Vegetarian" became President. I myself became the Secretary. The club went well for a while, but came to an end in the course of a few months. For I left the locality, according to my custom of moving from place to place periodically. But this brief and modest experience gave me some little training in organizing and conducting institutions. 
Meaning of the word marked with <WSD> tags:  A beginner; a person who is new to a subject, skill, or belief.