Perhaps there is no other knowing than the mere competence of the act. If at the heart of one's being, there is no self to which one ought to be true, then sincerity is simply nerve; it lies in the unabashed vigor of the pretense. But pretense is only pretense when it is assumed that the act is not true to the agent. Find the agent.
I don't mind what the opposition say of me so long as they don't tell the truth about me. But when they descend to telling the truth about me I consider that this is taking an unfair advantage.
Chaos of thought and passion, all confused; Still by himself abused or disabused; Created half to rise, and half to fall; Great lord of all things, yet a prey to all; Sole judge of truth, in endless error hurled,- The glory, jest, and riddle of the world.
Even great spirits have only their five-fingers' breadth of experience - just beyond it their thinking ceases and their endless empty space and stupidity begins.
But say, my lord, it were not regist'red,
Methinks the truth should live from age to age,
As 'twere retailed to all posterity,
Even to the general all-ending day.
On love, not harming others, and respecting all beings. Even animals have these elements in their behavioral patterns. We should start by observing how animals act. They are honest and appreciate it when we are honest with them. If you present something nice to an animal in one hand while hiding a rope in the other, the creature will know your intention. Yet animals have no religion, no constitution. Basic nature has endowed them with the faculty of discernment. It is the same for humans.