There duality to the universe that spins everything and sometimes in people themselves.

Predictability is a weakness.

New blood severs old ties.

For those people who believe no one can truly change I would note that roughly every seven to ten years all the cells in our bodies are replicated but some cells often change internally. We are never entirely the people we once were.

Ethics should dictate our beliefs because they are more enduring. Decency and kindness will be ever thus while human beliefs might change with the times.