“The song had resonance for a burgeoning self-empowerment movement for African-Americans during the post-civil-rights-movement 1970s, as well as women demanding more respect during those same years, but the message had a universal and inspirational appeal.” ~ Wikipedia
How true their message is to this day. Being in HR, I think it applies so well to the workplace. If you model respect you will be respected; respecting others will become easier because you will look for their abilities and contributions.
Perhaps today is a good day to find the things you like about you and give yourself some credit for it.