“Society grows great when old men plant trees whose shade they know they shall never sit in.”
“The true meaning of life is to plant trees whose shade you never expect to sit under.”
“A man has made at least a start on discovering the meaning of human life when he plants shade trees under which he knows full well he will never sit.”
“There's a special kind of man who plants a tree when he knows he'll move on before it's big enough for him to sit in it's shade.”
“Someone's sitting in the shade today because someone planted a tree a long time ago.”
“Too old to plant trees for my own gratification, I shall do it for my posterity.”