I think that it would be less difficult to live eternally than to be deprived of sleep throughout life. - Anton Chekhov

The unhappy are egoistic, spiteful, unjust, cruel, and less capable of understanding each other than fools. Unhappiness does not bring people together but draws them apart, and even where one would fancy people should be united by the similarity of their sorrow, far more injustice and cruelty is generated than in comparatively placid surroundings.

Or he walked about and stopped in the drawing-room before a photograph taken seven years ago, soon after his marriage ... a family group: his father-in-law, his mother-in-law, his wife Olga Dmitrievna when she was twenty, and himself in the rôle of a happy young husband. His father-in-law, a clean-shaven, dropsical privy councillor, crafty and avaricious; his mother-in-law, a stout lady with small predatory features like a weasel, who loved her daughter to distraction and helped her in everything; if her daughter were strangling some one, the mother would not have protested, but would only have screened her with her skirts. Olga Dmitrievna, too, had small predatory-looking features, but more expressive and bolder than her mother's; she was not a weasel, but a beast on a bigger scale!

What seems to us serious, significant and important will, in future times, be forgotten or won’t seem important at all.