this is an article about emotions and how they re connected and opposed to each other. the article also talks about the different point of views of Ekman and Tomkins. The article is also related to this topic as well:
it talks about 6 or 8 basic emotions that we feel and easily perceive and how the other emotions evolves from the others. One would note that on Plutchik’s wheel Fear is opposed to Anger; Happiness to Sadness; Disgust to Trust (contempt in our scheme) and Surprise to Interest.