...although in the US these are typically recited in English, signifying:
Each seek perfection of character
Each be faithful (protect the way of truth)
Each endeavour (foster the spirit of effort)
Each respect others
Each refrain from violent behavior (guard against impetuous courage)
The word Hitotsu means "one" or "first" and is prepended to each rule to place it at the same level of importance as the others. The word koto which ends each rule means "thing" and is used as a conjunction between rules.