lost...and can't be found

I am sorry that I don't understand. Can you clear explain me?

Logic says so,we never knew the value of anything unless we lost it. So with people we love and neglect,and find that we need them in our lives. This is one of the sad truth in life,losing someone before realizing his/her worth just to find out he/she can never be ours to hold again. Have a happy Sunday and enjoy mylotting