Fear vs Reality
Most of the times we worry based on fear of losing a person/material/opportunity etc. Eventhough it's not real, we tend to live in the future and miss the wonderful moment we are in.
Imagine a beautiful sunny day with birds singing, Trees all green and lushy, and you hear a possibility of end of world the next Month. What would be the state of your mind? A realized being would still continue to make the best use of the moment enjoying the beauty around while preparing for the calamity. A normal human would start worrying and make people around worry, ignoring al the goodness around in the moment.
It's not bad to plan or think about future. It's not okay to live in the future. There is a subtlety here that makes a huge difference how one leads their life. When I first across this aspect in 2016, it made no sense at all to me. I started wondering what does it mean by living in the moment but can still plan for future. It took me few years to actually practice it and implement it.
I came across a very painful situation recently about a possibility of loss. I witnessed pain/terror when I reacted to the situation as if it already happened (by living in the future) vs the calmness and ability to respond to avoid the situation when I consciously chose to differentiate the subtleness. All I had to do was to convince my mind that it hasn't happened yet and what's out there in the current moment is all good. So, if it's all good why to go through the unpleasant feeling instead of embracing the moment. I should say, it made ton of difference.