"I know nothing about how to win over others. I know only the way know the way to win over myself." — attributed to the (master) swordsman Yagyu, who… - Yamamoto Tsunetomo

Sincerity does not only complete the self; it is the means by which all things are completed. As the self is completed, there is human-heartedness; as things are completed, there is wisdom. This is the virtue of one’s character, and the Way of joining the internal and external. Thus, when we use this, everything is correct.

It is difficult for a fool's habits to change to selflessness. ... Because we do most things relying only on our own sagacity we become self-interested, turn our backs on reason, and things do not turn out well. As seen by other people this is sordid, weak, narrow and inefficient. When one is not capable of true intelligence, it is good to consult with someone of good sense. An advisor will fulfill the Way when he makes a decision by selfless and frank intelligence because he is not personally involved. This way of doing things will certainly be seen by others as being strongly rooted. It is, for example, like a large tree with many roots. One man's intelligence is like a tree that has been simply stuck in the ground. We learn about the sayings and deeds of the men of old in order to entrust ourselves to their wisdom and prevent selfishness. When we throw off our own bias, follow the sayings of the ancients, and confer with other people, matters should go well and without mishap.

The supreme style of love is unknown love. If the affection is known by the beloved, that love is snob. If you sacrifice your life for the beloved, and she recognises your love after you die, your soul would be appraised.