Keter is the very First Sefirot within the Tree of Life. Keter is Hebrew and means “Crown”. It represents the very beginning of creation at the highest soul level. In fact we can say it is even before creation. Think of it as the point between the Creator and beginning of creation. It can be called “the thought of creation”. Liken it to the thought before the formulation and execution of a plan – the implementation of creation.
This acts as an anchor point for the rest of creation. It is the source and sustainment point of creation from the soul to physical creation. In terms of the Tree of Life it is the source and sustainer of the rest of the Sefirot. So for the first Triad this Sefirah is the source and sustainer, but is not contained within that triad.
Imagine picking up a string with a weight at the end. As we pick up the string end, with the weight on the other end, we will see that the weight will find its balance directly centered under the hand, like a plumb line. It simply automatically happens. Keter does the same for the Tree of Life. As Keter is suspended, the rest of the Tree will find its correct balance. Thus all triads as well will be correctly suspended and balanced.
Keter is critical and essential for the existence of the Tree of Life in a properly balanced state. Keep in mind the Tree of Life is multidimensional and as such requires a point of reference to balance from. Keter is the point of reference of all.
Ask yourself, what role does Keter mean to me at a human level?