Confucius - The Doctrine of the Mean - 07
Type of Spiritual Experience
sincerity sɪnˈsɛrəti/ noun
the absence of pretence, deceit, or hypocrisy
A description of the experience
500 BC THE DOCTRINE OF THE MEAN Confucius translated by James Legge 
When we have intelligence resulting from sincerity, this condition is to be ascribed to nature; when we have sincerity resulting from intelligence, this condition is to be ascribed to instruction. But given the sincerity, and there shall be the intelligence; given the intelligence, and there shall be the sincerity.
It is only he who is possessed of the most complete sincerity that can exist under heaven, who can give its full development to his nature. Able to give its full development to his own nature, he can do the same to the nature of other men. Able to give its full development to the nature of other men, he can give their full development to the natures of animals and things. Able to give their full development to the natures of creatures and things, he can assist the transforming and nourishing powers of Heaven and Earth. Able to assist the transforming and nourishing powers of Heaven and Earth, he may with Heaven and Earth form a ternion.
Next to the above is he who cultivates to the utmost the shoots of goodness in him. From those he can attain to the possession of sincerity. This sincerity becomes apparent. From being apparent, it becomes manifest. From being manifest, it becomes brilliant.
Brilliant, it affects others. Affecting others, they are changed by it. Changed by it, they are transformed. It is only he who is possessed of the most complete sincerity that can exist under heaven, who can transform.
It is characteristic of the most entire sincerity to be able to foreknow. When a nation or family is about to flourish, there are sure to be happy omens; and when it is about to perish, there are sure to be unlucky omens. Such events are seen in the milfoil and tortoise, and affect the movements of the four limbs. When calamity or happiness is about to come, the good shall certainly be foreknown by him, and the evil also. Therefore the individual possessed of the most complete sincerity is like a spirit.
Sincerity is that whereby self-completion is effected, and its way is that by which man must direct himself.
Sincerity is the end and beginning of things; without sincerity there would be nothing. On this account, the superior man regards the attainment of sincerity as the most excellent thing.