This is a perfect reflection of our multiverses we live in everything is in constant flux even though what we see in front of us seems to be solid.
Things we do not perceive are constantly moving i.e. energies, frequencies and vibrations. Science is finally waking up to this fact.
When science and religion merges our evolution will come to full swing! Yes, our outer reality reflects our inner reality which is a bit hard to wrap your head around but that's how it is and vice versa.
As the human consciousness is shifting rapidly NOW, you can more easily see how everything is linked together and the illusion of separation we have been living in so far.
Take some time and think and reflect about people coming in and out in your life the recent years. It's astonishing is it NOT? People constantly move in and out of your 'view', some are present longer than otherS but everyone has a purpose that is interlinked with you.
On a personal note I've experienced this first hand the last year and I know lot's of other people who also have taken notice about this.
It's so easy to be caught up in distractions such as work, to do list's, family issues and then suddenly the retirement check arrives without any reflection about life.
It's also easy to look only outside oneself and missing to look within - take some time and step back and reflect a little bit, not to judge yourself but in order to find out what you are supposed to actually do on this planet...
We are the one we've been waiting for!