(noun) Something secret or unexplainable; an unknown. Example: "The truth behind the events remains a mystery."
"The most beautiful experience we can have is the mysterious. It is the fundamental emotion that stands at the cradle of true art and true science."
"Tomorrow is a mystery. Today is a gift. That is why it is called the present."
"When we remember we are all mad, the mysteries disappear and life stands explained."
"Be extremely subtle even to the point of formlessness. Be extremely mysterious even to the point of soundlessness. Thereby you can be the director of the opponent's fate."
"There are no words that can tell the hidden spirit of the wilderness, that can reveal its mystery, its melancholy and its charm."
"It is such a mysterious place, the land of tears."
"A bore is someone who deprives you of solitude without providing you with company."
"The mystery of love is greater than the mystery of death."
"In a good bookroom you feel in some mysterious way that you are absorbing the wisdom contained in all the books through your skin, without even opening them."