It is normal that we are concerned with what is happening because we do not know what future is waiting for us. And this is why we are not happy because we do not know and do not have the answer to concerns within our hearts.
It is common for us to worry about things that do not occur in the future, because we did not know what was waiting for us. And this is why we are not happy. We do not know And no response to concerns within our mind.
It is normal that we are concerned with what is not happening, because we know that in the future there อะไรกำลัง waiting for us. And this is the reason we are unhappy because we don't know.