In this quote, Rodney Dangerfield is using a play on words to express his view on life. By saying "life is just a bowl of pits," he is comparing life to a bowl of fruit pits, which are generally disposed of and not viewed as valuable. This recommends that he sees life as mundane and unfulfilling, similar to a bowl of pits. It might likewise imply that life has lots of barriers and obstacles, comparable to the pits discovered in fruit. Overall, Dangerfield's quote communicates a sense of dissatisfaction and discontentment with life, highlighting the battles and disappointments that can come with it.
"Life is life - whether in a cat, or dog or man. There is no difference there between a cat or a man. The idea of difference is a human conception for man's own advantage"