The word coherent means "logical or consistent".
A coherent emotion is one that is
Our day to day life includes a constant balancing act between different emotions that spring up in response to events around us.
Emotions can be divided into coherent and incoherent. Coherent emotions tend to have more distinct features and contribute positively to experience.
Love is a complex emotion which helps bring people together. This ranges from the lust of a wedded couple to the belongingness of a Church congregation.
Humans are a naturally aggressive species. Emotionally fit people are those who have learned to channel their anger.