No big G is not General Mills the makers of: Cherrios,  Chex and Lucky Charms....

"G" is the GOD of the infinite universe of "all knowing", space and time.

"g" is us, individually, the little gods of this planet. We each have an expiration date, though it is not stamped on our butt. Our legacy "of life" is akin to being a species of semi intellectual species of  breeding magots, evolved from monkeys and neanderthals. We have evolved to be aware of ourselves and the possibility, probability of the existence of "G". Our very limited awareness keeps us at the "g" level.