From Being Upright by Reb Anderson
When you're sailing in a boat, you can see the circle of water around you, but not the whole ocean. If you that think the circle of water is the ocean, then you are incorrect. Likewise, if you wholeheartedly attempt to tell the truth without being aware of the limitations of your vision, then your words will be a further enactment of your ignorance. If you are aware of your limited vision, which is a step toward telling the truth, then you will be somewhat anxious about whether you are telling the whole truth. Feeling such anxiety, you may hold more tightly to your limited view as the truth, and, to assuage the anxiety, try to prove that it is true. On the other hand, if your attempt to speak the truth is grounded in the · recognition of your own limits of vision, then the truth will be realized and you will be freed from your anxiety.
The truth is not realized just by me saying what I think is the truth. Truth arises when my truth is offered, but not placed above the truth of others. The whole truth is realized in the marriage of the minds of all beings. As is said in some wedding ceremonies, "I plight thee my troth." In other words, I endanger my truth to you. The truth is not held on my side or on your side. I endanger my truth to others in the faith that I will thus be liberated from my own small truth and realize the oceanic truth. I can never see beyond my own circle of water, and yet, being aware that my circle is just a circle and not the ocean, I am liberated from it.
The ultimate meaning is that your truth at this moment is just that. To make more or less of it would not be upright. Practicing no false speech guides you into uprightness, and uprightness guides you into no false speech, but you will never have a final understanding of the precepts or of being upright. No one can measure the ocean of what being upright means. With an upright mind you contemplate your experience in a state of wonder. Out of such a mind of selfless wonder new revelations of meaning constantly arise.