In this commentary on the special issue on emotional development, I focus on the papers by Holodynski and Seeger (2019) and by Hoemann, Xu, and Barrett (2019). I suggest that although understanding our emotions is an important part of emotional development; emotional development cannot be reduced to concept development, even when such concepts include understanding of physiological and behavioral responses and feelings. I highlight the importance of emotions as promoters of immediate and urgent responses that cannot and should not be preceded by contemplative thought, and as the core of who we are as individuals, and I discuss the many levels at which emotional development occurs--from gene to behavior. I recommend that interdisciplinary teams work together to enable research that helps the field in better understanding emotional development in its full complexity.