For a samurai, a simple word is important no matter where he may be. By just one single word martial valor can be made apparent. In peaceful times words show one's bravery. In troubled times, too, one knows that by a single word his strength or cowardice can be seen. This single word is the flower of one's heart. It is not something said simply with one's mouth.
A warrior should not say something fainthearted even casually. He should set his mind to this beforehand. Even in trifling matters the depths of one's heart can be seen.