In 1860 he was called to the bar and joined the northern circuit, then in its palmy days of undividedness.

The unity or oneness of being is the undividedness of being: Unum est id quod est indivisum in se: Universaliter quaecunque non habent divisionem, inquantum non habent, sic unum dicuntur.133 When, therefore, we conceive being as undivided into constitutive parts, and unmultiplied into repetitions of itself, we conceive it as a being, as one.

Now multitude involves dividedness; but it also involves and presupposes the intrinsic undividedness or unity of each constituent of the manifold.

So when we say, the essence is one, the term "one" signifies the essence undivided; and when we say the person is one, it signifies the person undivided; and when we say the persons are many, we signify those persons, and their individual undividedness; for it is of the very nature of multitude that it should be composed of units.