“So many people are most miserable these days.
The reason they find it so difficult to be happy is that they always view the past to be better than it was, the present dramatically worse than it is, and the future less resolute than it will be.
The idea of happiness is foreign to them.
Is this not something that is innate because babies are born with
"tabula rasa" which refers to the epistemological idea that individuals are born without built-in mental content and that therefore all knowledge comes from experience or perception. However I don't disagree with the doctrine of Innatism which holds that the mind is born already in possession of certain knowledge.
A smile, for instance is natural and innate!
So it is a combination of the two schools of thought.”
Related quotes

Variant: People see the past better than it was, the present worse than it is and the future less resolved than it’ll be.

Original: (it) Fa che ogni tuo istante sia sempre migliore di quello passato, si vive di presente per il futuro, si vive d'amore, musica, felicità e soprattutto coraggio nei momenti difficili.
Source: prevale.net

Alternate translation: We go to great pains to alter life for the happiness of our descendants and our descendants will say as usual: things used to be so much better, life today is worse than it used to be.
Мы хлопочем, чтобы изменить жизнь, чтобы потомки были счастливы, а потомки скажут по обыкновению: прежде лучше было, теперешняя жизнь хуже прежней.
Note-Book of Anton Chekhov (1921)

The Law of Mind (1892)

Source: Emotional amoral egoism (2008), p.203

In notes to Anita Pollitzer, Abiquiu, New Mexico, (after February, 1968); as quoted in The Complete Correspondence of Georgia O’Keeffe & Anita Pollitzer, ed. Clive Giboire, Touchstone Books, Simon & Schuster Inc., New York, 1990, p. 324
1960s

1840s, Heroes and Hero-Worship (1840), The Hero as Divinity

“Most people would rather be certain they're miserable, than risk being happy.”