So here it brings the following which will serve as a good introduction:
In line with the kabbalistic tradition, R. Israel Ba'al Shem Tov (the Besht), the founder of Hasidism, perceived everything to be infused with Divine sparks: "It is a great principle that there are holy sparks in all there is in the world. Nothing is void of sparks, even trees and stones." (As related in Besht, Zava'at ha-Rivash, photocopy (Brooklyn: Otsar Hahasidim, 1991), section 141, p. 54 (Hebrew). Many of the sayings in this book are probably not attributable to the Besht but to R. Dov Ber, the Maggid of Mezeritch, his main disciple.) He further taught that such sparks are also in "all of man's actions. Even in man's sins there are sparks resulting from the breaking of the vessels." This panentheistic worldview, which sees elements of the Divine in everything, should not be confused with the panthe-istic doctrine that G-d and nature are identical.
So it would seem that a fundamental tenet of Chasidus is the notion that every being retains some spark of the Divine and the challenge of a Jew's existence is to unlock and access these sparks through the 'breaking of the klipot' which essentially means shrugging off the weight of materialism to pursue a more spiritually aware life. This breaking is done through our mitzvah performance which refines us with each one that we do. Rabbi Norman Lamm notes that through these acts it serves to create a 'tikkun' bringing us back to a more perfect state as seen when the world was first created. (Rabbi Norman Lamm provides a good breakdown here refer to footnote 4). Also look here for a good outline.