Some quotes about kindness are "Kindness is a language which the deaf can hear and the blind can see" by Mark Twain, "Be kind, for everyone you meet is fighting a harder battle" by Plato and "You cannot do a kindness too soon, for you never know how soon it will be too late" by Ralph Waldo Emerson. Aesop said, "No act of kindness, no matter how small, is ever wasted."
Mark Twain, pen name of Samuel Clemens, is known for his novels and for his many sayings. He had a unique way of cutting to the very soul of his subject matter. For someone who made a living with language, Twain showed how powerful he believed kindness to be when he spoke of it as the "language" that could reach those normal language could not.
The great philosopher Plato wrote on a variety of topics from justice to politics and from equality to theology.
His philosophical discussions covered many topics of the human condition. His quote above invites hearers to consider the unknown plights of all they meet, showing kindness to them and recognizing the battles they may face.
Preacher, essayist and poet Ralph Waldo Emerson realized the importance of performing a kindness whenever possible. He warned against delays because "you never know how soon it will be too late."
Aesop is known for his fables with their meaningful inherent messages. The quote above attributed to Aesop is the moral to the story "The Lion and the Mouse," in which a lion spares the life of a mouse only to have his own life saved by the same little mouse later.