The Dutch theologian Jacobus Arminius (1560-1609) criticized the orthodox Calvinist position on the doctrine of predestination. The result was a split in the Dutch Reformed Church, and followers of his position came to be known as Arminians.
Everyone has to breathe. Therefore, you can’t say a line of poetry endlessly. You need breaks. A caesura is perfect because it gives you natural breaks in poetry. And poets, like Shakespeare, have used this throughout history. See it in action through these caesura examples.