Sentence:  The most <WSD>rapid</WSD> and most seductive transition in all human nature is that which attends the palliation of a ravenous appetite. There is something humiliating about it....Can those harmless but refined fellow-diners be the selfish cads whose gluttony and personal appearance so raised your contemptuous wrath on your arrival? 
Meaning of the word marked with <WSD> tags:  Very swift or quick.