WHY DO GREAT THINGS ALWAYS COME IN SETS OF THREE???

"Three" little pigs, "three" Muskateers, have you ever wondered why characters in our childhood stories came in sets of three?
The "rule of three" is a writing technique that allows writers to connect with their readers on a deep psychological level. A set of three digits, in particular, has an odd psychological effect on our brains that aids in memory. The obvious next question is, why not four or two, or any other number for that matter?

Why are three birds in hand better than a hundred in the bush?
This is because, as humans, we are better at recognising patterns and shapes, and three is the smallest number that allows us to create these shapes. It's neither too big nor too small, making it the ideal compromise.

A triangle has three sides and has the fewest number of sides of any polygon.

Learning shapes is easier than learning words because our ancestors were better at remembering visual cues than raw data. We learn words through association, and despite its small size, a list of three is highly cohesive as a memory device.

Another sign of our gift is that good IQ tests assess pattern-based skill sets as a fair indicator of intelligence, as they require little to no prior knowledge to answer. This eliminates the element of rote learning, as well as the unfair disadvantage of not having access to intellectual resources, making it more accurate than verbal or scientific reasoning. This suggests that we are hardwired to recognise patterns faster than anything else. Even as a bulleted list or a simple sentence, the number three subconsciously appears as a pattern, allowing us to remember it better.

Now that we understand the significance of three, we can understand why Goldilocks met a family of three bears or why Julius Caesar boasted "Veni, vidi, vici" in his letter to the Roman Senate in 47 B.C.
The power of the number three isn't just understood implicitly through storytelling. The Latin phrase "omne trium perfectum," which translates to "Everything in three is perfect," tells us that we knew its impact a long time ago.