Glass

Dad held a cup of water.

Dad: Son, how heavy is this glass of water?

Son: I don't know. Probably 100g?

Dad: Can you handle 100g glass?

Son: I'm strong. No problem.

Dad: Yes, you probably can. But how long can you hold it without feeling ache on your hand?

Son: I don't know. Maybe 10 minutes?

Dad: 10 minutes and you probably felt tired. 1 hour? You will feel the glass becomes heavier and heavier.

It's just like stress. You can handle a little weight now. But that little weight is gonna be heavier and heavier and soon it will weigh you down. That's why we need time for ourselves to relax and to clear our mind.

Be happy (: