In the early days of the United States Patent Office, an application for a patent for an invention was accompanied by a working model of that invention.
When a child in math class is given a large fraction and told to reduce it to its lowest terms, he may have to make many small reductions before he reaches the lowest terms.
Truth, righteousness, the gospel of peace, faith, salvation, the word of God—this is the armament that the writer of Ephesians calls for when he commands: "Take unto you the whole armour of God, that ye may be able to withstand in the evil day, and having done all, to stand.