“…You see, the Wheel of Time weaves the Pattern of the Ages, and the threads it uses are lives. It is not fixed, the Pattern, not always. If a man tries to change the direction of his life and the Pattern has room for it, the Wheel just weaves on and takes it in. There is always room for small changes, but sometimes the Pattern simply won’t accept a big change, no matter how hard you try. You understand?”
Rand nodded. “I could live on the farm or in Emond’s Field, and that would be a small change. If I wanted to be a king, though…” He laughed, and Loial gave a grin that almost split his face in two. His teeth were white, and as broad as chisels.
“Yes, that’s it. But sometimes the change chooses you, or the Wheel chooses it for you. And sometimes the Wheel bends a life-thread, or several threads, in such a way that all the surrounding threads are forced to swirl around it, and those force other threads, and those still others, and on and on. That first bending to make the Web, that is ta’veren, and there is nothing you can do to change it, not until the Pattern itself changes. The Web—ta’maral’ailen, it’s called—can last for weeks, or for years. It can take in a town, or even the whole Pattern. Artur Hawkwing was ta’veren. So was Lews Therin Kinslayer, for that matter, I suppose.”
https://www.tor.com/2019/08/06/readi...to-be-taveren/