It sounds exactly like Lincoln — plainspoken, folksy, a little wry, the voice of a man who'd seen enough hardship to earn a hopeful word. That perfect fit is probably why it's stuck to his name so tightly. In the spirit of honesty, though, the attribution is shakier than the quote's fame suggests.

No one has located these words in Lincoln's actual letters or speeches, and he left a large, well-documented written record. Like a lot of warm, quotable one-liners, it seems to have drifted toward the most famous plausible name over the years. So it's fairest to file it as "attributed to Lincoln" — real folk wisdom, uncertain authorship.

And the wisdom, whoever shaped it, is genuinely sturdy. It makes a bold claim: that happiness is, to a surprising degree, a decision. Not a decision that erases real trouble — "usually" and "about as" are doing careful work in the sentence, leaving room for the days and circumstances that are simply hard. But within that honest margin, it insists we have far more say over our contentment than we tend to admit. Two people in near-identical situations can land in very different moods, and the difference is often what they've made their minds up to expect and notice.

That's an empowering thought precisely because it puts a lever back in your hand. If happiness were purely a matter of circumstance, you'd just have to wait and hope. This says otherwise: a real part of the work is internal, and it's available to you now, whatever the weather outside. Enjoy the line for the plain good sense it carries — just hold the "Lincoln said it" part a little more loosely than the posters do.