The main reason of feeling tired when you are working,even if you don’t have many Physical labors.

Some people think it is because of mental or emotional labor.But I think that is not the main reason.
The underlying reason is that you actually know very well what you do every day is meaningless.
People instinctively reject things that lack any sense of creativity and accomplishment and are particularly disgusted with mechanically repeated activities.
For work, too, your physical response is more honest than you are.
The bigger companies can only do smaller things.
The finer the process, the more streamlined the flow will be in front of you, as long as you repeat it mechanically.
This process is so absent and does not require brains.
Maybe your business card will go out, and people will blink their eyes and even deceive your loved ones and let them think that you are engaged in a great cause.
But you still can't deceive yourself, and you know that you are bored again today.
I spent a day at work.
Although you are fully aware of this, you will still sit here tomorrow and tomorrow.
You feel tired because you are unhappy and unhappy because you can't fool your own heart.