True friendship is like sound health; the value of it is seldom known until it is lost. Charles Caleb Colton
Your body is like a dew-drop on the morning grass, your life is as brief as a flash of lightning. Momentary and vain, it is lost in a moment. (From 'Fukan zazengi') Dōgen
Whenever the cause of the people is entrusted to professors, it is lost. Vladimir Lenin
I Think it is lost..... but nothing is ever lost nor can be lost. The body sluggish, aged, cold, the ember left from earlier fires shall duly flame again. Walt Whitman
A good thing is known when it is lost. Portuguese Proverb
We do not care of what we have, but we cry when it is lost. Russian Proverb