As Time Goes By, Space Warps

Looking at a candle burn, feeling that time is there without a change! Nothing is new under the sun while everything appears to be moving.
My own concern, my own life.
As I'm cooling down it seems to me that I'm slowing down. Temperature is the scalar measure of the heat (energy) level so as our energy level drops we slow down. Can we think of this energy level in terms of energy density and if so isn't it that energy and mass (the curvature of space according to Einstein) are related? So how are space -with its curvature- and time related? Gravity has been explained based on a warping of time/space. Where is energy in this picture?