Wayne Wonder says"you will never know what you got till you lose it".This is true for everyone life.When people got something they do not realize that what did i get but when they lost that .They will think oh! it was really important for me.He or she misses that.HE or she wants to get that agin.May be its wouldn"t be back agin.its can be in a realtionship,part of the life,love,mind,mood,things,happiness,trust and etc.So do your best on time before lose it.May be its helps you to build ur future life.