One of the wonders of the human mind, is its capability to explore the behavioural discourse of emotions, an attempt to understand one's own self, and in doing so, removing the proverbial blindfold over one's mind, and pursuing greater understanding of our place in this infinite universe.
There are two seemingly independent emotions: Sadness, and Anger, yet both are probably created from the same seed, but their path of growth takes them in separate directions. You see, Sadness; is a reaction of the soul to an exterior action; from someone or something that is perceived to be superior; a loved one who's been granted that superior status in our emotions to other people who have less influence over our emotional structure, like passers by outside our door, or; something that holds high regard in our hearts and minds: a job, a material possession, in which case it is transformed as it matures into a 3rd emotion; disappointment, and makes its own path of emotional discourse.
Anger on the other hand, is a reaction to something that's perceived to be inferior. The behavioural discourse of anger is a physical or verbal show of force, an attempt to assert our own superior status against another in an argument, or to shield our feeling of inferiority through a Don Quixote fashioned exercise of force, a subconscious attempt to substitute our genuine feeling of defeat; both collective, and individual, An attempt to convince ourselves and our surroundings of the virtue of this choice of reactionist emotion, in acheiving a mini satisfaction which gives us the illusion of victory in this man eat man world.
Although, and since one is exploring human behaviour, and trying to reach one's own peace, Sadness is a more positive emotion, despite its negative discourse, as it's directed within, unlike anger which is an outward emotion directed towards others, and seeks satisfaction in vengeance. Sadness lends delicacy to emotions, as it cleanses the soul from its perceived wrongs as it involves a feeling of guilt, a correction mechanism of the soul, an instinctive attempt to make it more susceptible to good, more accepting and forgiving, and ultimately, more patient, and in doing so, reaching an inner satisfaction that's felt but not desplayed, as it results in getting closer to the soul's original nature of rejecting injustice, abuse and offence; against one's self and others, which is, at the end; the ultimite wisdom of all.