Here is collection of sadness sayings:
"For of all sad words of tongue or pen, the saddest are these: "It might have been!"- John Greenleaf Whittier
"A man's sorrow runs uphill; true it is difficult for him to bear, but it is also difficult for him to keep." - Djuna Barnes
"A moment of time may make us unhappy forever." - John Gay
"Everyone is a moon and has a dark side which he never shows to anybody." - Mark Twain
"Sorrow looks back, worry looks around, faith looks up." - Unknown
"The saddest summary of a life contains three descriptions: could have, might have, and should have." - Louis E. Boone
"The secret of being miserable is to have leisure to bother about whether you are happy or not. The cure for it is occupation." - George Bernard Shaw
"Sorrows when shared are less burdensome, though joys divided are increased." - Josiah Gilbert Holland
"The tragedy of life is not that it ends so soon, but that we wait so long to begin it." - W. M. Lewis
"If you are bitter at heart, sugar in the mouth will not help you." - Yiddish Proverbs
"A wound heals but the scar remains." - Proverb
"Suffering is getting what you do not want while wanting what you do not get." - JI Packer
"The tragedy of life is not so much what men suffer, but rather what they miss." - Thomas Carlyle