"Do not rely on following the degree of understanding that you have discovered, but simply think, "This is not enough. - Yamamoto Tsunetomo

To think that being righteous is the best one can do and to do one's utmost to be righteous will, on the contrary, bring many mistakes. The Way is in a higher place than righteousness. This is very difficult to discover, but it is the highest wisdom. When seen from this standpoint, things like righteousness are rather shallow. If one does not understand this on his own, it cannot be known.

[...] if one seeks to resolve a problem, let it sit for a while, take time to think about the “Four Oaths” and subdue any self-centered thoughts, and then you will be able to proceed without faltering.

With regards to the way of death, if you are prepared to die at any time, you will be able to meet your release from life with equanimity. As calamities are usually not as bad as anticipated beforehand, it is foolhardy to feel anxiety about tribulations not yet endured. Just accept that the worst possible fate for a man in service is to become a rōnin, or death by seppuku. Then nothing will faze you.