Don't take things for granted

Things are more precious when they are lost.
Most of us just take things for granted.
Family,friends or even the air that we breath.
We never know how important they are until they are gone.
That's human nature.

Sometimes when i gaze at the sky,
sometimes when i stare into space,
sometimes when i flip through my past,
I only realized one thing,
how many good ppl and opportunities i have missed out in my life.

I think i am getting old,tat's why i behave like an elderly,keep on talking about the past.But i am just sentimental.It's a bad habit hard to be changed.

Btw i think today I have just screwed up the test.Gone case.
如果时间能够倒转。