This verse is an essential reference to the core of the Taoist traditions of self cultivation and meditation. Note the emphasis on the human form, the actual body itself. Note that concept of Qi is not mentioned in this verse. It is unnecessary to create power or to think power. You already possess energy. It is enough to align the body and calm the mind ( via the medium of the breath that will naturally settle and stabilize.   The power will gradually come on its own. CRC 2018