Convex reactions

Recently while taking a shower getting ready for the day, I noticed water slowing dripping from the bottom of the shower head. For that moment my focus came upon the drop about to fall and it seemed that everything else slowly shifted out of focus. That drip had my full attention as I could see the convex reflection of everything around me. I watched as it slowly accumulated until it could no longer be contained and then proceeded to drip. Right then I had a thought and I felt connected to that meaningless mass of water for that second. It was a symbol of emotions and everything inside of me or any other person. What is it that is within everyone of us that slowly accumulates until it cannot be contained? What is it that inspires us, makes us mad, or is something that we cannot simply keep within? I have had a lot of this kind of thought lately and am in the pursuit of finding out exactly what that is.