Hatha yoga postures come in numerous forms. For a beginner, states the historian of religion Mircea Eliade, these "asanas" are uncomfortable, typically difficult, cause the body shakes and typically unbearable to hold for extended periods of time. However, with repetition and persistence, as the muscle tone improves, the effort reduces and posture improves. According to the Hatha yoga texts, each posture becomes perfect when the "effort disappears", one no longer thinks about the posture and one's body position, breathes normally per "pranayama", and is able to dwell in one's meditation ("anantasamapattibhyam"). The "asanas" discussed in different Hatha yoga texts vary significantly. Unlike
Karma (2) Life forms not only receive and reap the consequence of their past karma, together they are the means to initiate, evaluate, judge, give and deliver consequence of karma to others. (3) Karma is a theory that explains some evils, not all (see moral evil versus natural evil). Other schools of Hinduism, as well as Buddhism and Jainism that do consider cycle of rebirths central to their beliefs and that karma from past lives affects one's present, believe that both free will ("Cetanā") and karma can co-exist; however, their answers have not persuaded all scholars. Another issue with the theory