a solemn promise, often invoking a divine witness, regarding one's future action or behavior (Source: Lexico.com)
In life we can find many examples of oaths. Wedding vows are a simple example. Here in the US, we have the Pledge of Allegiance. And many organizations require members to take an oath upon joining.
There's a reason why many oaths are sworn on Bibles or as part of a ceremony. An oath isn't simply a promise we've made to another person. A truth oath engages the power of the Divine.
When you take an oath, you are declaring your intention to the Universe. You are invoking unseen forces, and Life immediately starts to change to support your intention. Every act you perform after that is for you to align with the forces that are already supporting you.
That's the hidden power of oaths - the unseen Divine forces that you call in. Most of us aren't taught about that part of an oath. We're led to believe it's just a promise we're making to ourselves or another person. But that's only a small part of what happens when you take an oath.
For this very reason, students who join our mystery school take an oath during initiation. They promise to uphold certain agreements to their brothers and sisters in the program, but they also invoke all of the energies and opportunities that will be part of their path, especially the energy of their own Higher Self, which is the primary intention of their training.