“All you need are these: certainty of judgment in the present moment; action for the common good in the present moment; and an attitude of gratitude in the present moment for anything that comes your way.”
Marcus Aurelius, Meditations, 9.6
I feel like the words “certainty of judgment” imply a certainty of being correct. I think clarity of judgment and knowing with relative certainty that your judgment aligns with your good faith beliefs is what is important.