Final Arc: Volumi e trama

私が世界には危険が満ちていると信じ
I believe that the world is full of danger...

その危険からお前を護りたいと願うのは
And because of that danger, I desire to protect you...

私の中にその危険と同質の
That danger is also the same within me...

衝動があるからにほかならない
Therefore, I cannot help being impulsive...

The poem is self explanatory, take note however: Old Man Zangetsu does not make use of the traditional verb for protect and opts to use 護りたい (mamoritai); want to protect.