"How heavy is a glass of water?"

"The absolute weight doesn't matter. It depends on how long
I hold it. If I hold it for a minute, it's not a problem. If I hold it
for an hour, I'll have an ache in my arm. If I hold it for a day, my arm
will feel numb and paralyzed. In each case, the weight of the glass
doesn't change, but the longer I hold it, the heavier it becomes."

"The stresses and worries in life are like that glass of water. Think about them for a while and nothing happens. Think about them a bit longer and they begin to hurt. And if you think about them all day long, you will feel paralyzed – incapable of doing anything."

It's important to remember to let go of your stresses. As early in
the evening as you can, put all your burdens down. Don't carry them
through the evening and into the night. Remember to put the glass down!