This of course will not necessarily work with extreme emotions or under states of extreme mental and/or physical stress. After I had my baby, I went through a few days where any emotion I was feeling did not pass quickly. It stayed and stayed. My emotions all felt slow and sticky and to take forever to clear. That whole time, however, I was severely sleep deprived and was often going without food and water when I was hungry and thirsty as well. Yet I was still taking care of my infant and never letting him cry longer than a few seconds. So I hardly think my emotional state made me either selfish or immature.