Energy

Where and whenever energy cannot flow freely and instead is blocked by something and accumulates in a reservoir, it will eventually break free in a massive explosion, if not released in a controlled way. 
I think that this applies to physics, health of the body as well as of the mind and last but not least the societies we live in.

New things require energy and often they require more energy than provided by the natural flow. Therefore blocking it in order to release it in a controlled fashion can be an extremely productive measure. Doing this at regular intervals in order to to review and renew aspects of any complex system results in a pulse that signals health. Just like your heart this beat should neither be too slow nor too fast.

Let your change be more like the beat of your heart than like its catastrophic collapse.

Thomas Schindler