While many speak of unity there is no real unity where differences abound, for example, between political parties that are hostile to each other or differences in religious doctrines. Nor is there unity through the stamping out of differences; forcing everyone to pretend there is unity.
If there is such a thing as unity its meaning is more down to earth such as cooperation, or collaboration and agreement. Even the idea of consensus can be put under the rubric of unity. But this kind of unity doesn’t last long.
Real unity is spiritual unity, that state of being single or one, much like uniting a bottle of water from France with the water of Lake Tahoe, in the Sierra Nevada, by pouring it into the lake. Spiritual unity is something humans know little of. What is it like to become single or yoked with the very spiritual substance of the universe? The bulk of answers are mere guesses.
For us to achieve unity with the fundamental substance or essence of the universe there first has to be something fundamental within us that is the same as that with which we hope to become one, otherwise there can be no knowing of unification, i.e., the state of being unified.
During this process, in order to become one, we have to go by way of negation, removing what is not our intrinsic self to eventually become one with what we are. This is to say, that first we have to have faith that this world which lies before us is not who we really are; nor is this carnal body that came from our mother’s birth canal. Even our thoughts have to be looked upon as not being fundamental enough.
Such negation eventually comes to the last barrier which is subject to change. Patiently facing this barrier, it naturally disappears. Then we are left with our true self facing the spiritual substance of the universe. This is real unity—like a drop of water going back into the ocean.