Law of energy

Like the law of gravity
there's this law of energy,
the former is visible
the latter we cannot see
both are infallible;

the gift of forgiveness
energizes, liberates the giver
the receiver at times, unaware;

to use high-energy words
from dawn to dusk
is the most sincere task
to change our world;

gratitude, acceptance
to top the list
complain, intolerance
low-energy words
make no sense 
to say the least.