Aren't Some of the Sayings Rather Common Place?

May be. But then we many times ignore the most obvious and thus require the most common place and common sense advice. Once Hazrat Maulana Aslam Qasmi Sahab (DB), in the Kennedy Hall Auditorium of the Aligarh Muslim University,  while speaking about excellence of gathering knowledge said that even a bundle of bidis (the rustic cigarette, so to say) has a lot of knowledge on it. It may not look like a very deep observation but it, in fact is. Replace the the cigarette by gutka and ask a person who has ignored the warnings on the sachets of gutka for far too long.