"The nefesh Elokis [Godly soul] is a chelek [portion] of Eloka mimaal mammash" [G-d on High, Really!] – What does it mean "chelek", what portion of Hashem is our nefesh Elokis? What does this mean?"
There is nothing besides G-d. He is all. When He creates He does so by willing matter into being as if by using "husks," or coverings, as if thickening His words which are either very, very thick as in a rock, or thinner, as in an animal, or thinner yet, as in the human's animal soul, and even substantially less covering, as in the Jew's holy soul.
A chekek is a portion which is an area as opposed to a part. The concept "part" implies separate, while the concept "portion" envisions the portion to be merely an undisturbed area still resting within the whole.