Although most theories in psychology suggest that increased insight is associated with a happier life, research is rather limited as to how insight facilitates happiness. Because insight is believed to help individuals in different life areas, such as romantic relationships, it can be argued that it may facilitate happiness indirectly through relationship satisfaction. Therefore, the current study examines the mediating role of relationship satisfaction in the relationship between insight and happiness. The data was collected from 185 undergraduate students in committed relationships through the Insight Scale, the Relationship Assessment Scale and the Oxford Happiness Scale-Short Form. The results of the mediation analysis confirm that there is a significant relationship between insight and happiness and that relationship satisfaction partially mediates this relationship. These findings suggest that insight may lead to a happier life because of the instrumental role it may play in establishing and/or maintaining romantic relationships that are more satisfactory.