The concept of "feeling the necessity for" has a range of antonyms depending on the context in which it is used. To begin with, if we are considering an individual's desire for something, the antonyms could be indifference, apathy or disinterest. Similarly, if we are examining the need to do something, antonyms could include complacency, nonchalance or even laziness. Conversely, if we are evaluating the sense of being forced to do something, the antonyms could be freedom, liberty or choice. Ultimately, the antonyms for "feeling the necessity for" all revolve around varying degrees of enthusiasm or obligation, or lack thereof.