Written in the commencement of his career, they are characterized by a youthful vigor not to be found in some of his subsequent works, even when more elaborate, finished, and richer in combinations; a vigor, which is entirely lost in his latest productions, marked by an over-excited sensibility, a morbid irritability, and giving painful intimations of his own state of suffering and exhaustion.
If it were our intention to discuss the development of Piano music in the language of the Schools, we would dissect his magnificent pages, which afford so rich a field for scientific observation.

We would, in the first place, analyze his Nocturnes, Ballades, Impromptus, Scherzos, which are full of refinements of harmony never heard before; bold, and of startling originality.

We would also examine his Polonaises, Mazourkas, Waltzes and Boleros.

But this is not the time or place for such a study, which would be interesting only to the adepts in Counterpoint and Thoroughbass.
It is the feeling which overflows in all his works, which has rendered them known and popular; feeling of a character eminently romantic, subjective individual, peculiar to their author, yet awakening immediate sympathy; appealing not alone to the heart of that country indebted to him for yet one glory more, but to all who can be touched by the misfortunes of exile, or moved by the tenderness of love.

Not content with success in the field in which he was free to design, with such perfect grace, the contours chosen by himself, Chopin also wished to fetter his ideal thoughts with classic chains.