The term was originally used to indicate that we should, throughout our lifetimes, maintain the mind we had on the day we awakened to the path of faith and pledged to follow this path, and that we should hold firm to that pledge through the rest of our lives. In particular, the term refers to upholding the mind of the day we received the truth of the Sazuke as our mind for a lifetime. Says a Divine Direction:

Sah, sah, sah, I shall bestow the one truth of effectiveness on you. One day, a lifetime, the one mind. Sah, sah, the Sazuke, the Sazuke.

Osashizu, December 7, 1888

As commonly used, however, the term also frequently refers to regarding "this day"--today--as our entire lifetime and living our whole life "now."