We all move in and out of different phases of our lives. We can look back and find the times when a change was big enough that we would now call this a new part of our journey.
Sometimes these moments of change are external while others are a conscious decision that we make. Either way, we need to make time to grieve what is evolving and may never be again.
This doesn't mean that the next phase is better or worse than what came before, it just means that it is different and we owe it to our current way of doing things to take a moment to say good bye.