There are two sorts of analysis, each proper in its place. The one _philosophical_, by which the different parts of a subject are so arranged, as to exhibit in distinct groups those things that depend on the same or like principles, and such as are marked by characteristic points of resemblance; giving a sort of honorary precedence to the most important. The other sort of analysis may be termed _logical_. It is that method by which different propositions are so arranged, as that no one of them shall ever be brought under consideration, until all others which may be necessary to the right understanding of that one, have been established and explained. Of this last description sire Euclid's elements, in which it is interesting to observe that no one proposition could with propriety be made to change its place; each one depending for its demonstration, directly or indirectly, upon all that have gone before. Blackstone's Commentaries may be cited as an example of _philosophical_ analysis. He has indeed been careful to avoid perplexing his reader, through the want of a strictly _logical_ arrangement, by dealing chiefly in generalities, and never descending to such particulars as might be unintelligible for want of a knowledge of matters not yet treated of. This I take to be the reason why his work has been characterized as being "less an institute of law, than a methodical guide or elementary work adapted to the commencement of a course of study. He treats most subjects in a manner too general and cursory to give the student an adequate knowledge of them. After having pursued his beautiful arrangement, he is obliged to seek elsewhere for farther details. After having learnt the advantage of system, he is almost at the threshold of the science, turned back without a guide, to grope among the mazy volumes of our crowded libraries. This cannot be right. If system is of advantage at all, it is of advantage throughout. Were it practicable, it would be better for the student to have a single work, which embracing the whole subject, should properly arrange every principle and every case essential to be known preparatory to his stepping on the _arena_. Much, very much indeed, would still be left to be explored in the course of his professional career, independent of the _apices juris_, which the most vigorous and persevering alone can hope to attain."--Tucker's Commentary, Introduction, p. 4.