"It was a decision to work clean. I just prefer to work that way. I have no problem with comedians who don't work that way. There was a temptation in the early '70s to reconsider. I decided against it"

Bob Newhart is referring to his choice to not utilize profanity in his funny routines. He is saying that he chooses to work tidy, but he has no issue with comedians who choose to use obscenity in their routines. He is also saying that in the early 1970s, there was a temptation to reevaluate his choice to not use blasphemy, but he eventually chose versus it. This quote reveals that Bob Newhart is a comedian who values tidy comedy and is willing to stand by his decision to not use profanity in his routines. He is also showing respect for other comics who choose to use profanity in their routines, as he acknowledges that it is a personal option.