Hatha yoga of "Hatha yoga pradipika", "Siddhasana" is the most suitable and easiest posture to learn breathing exercises. The different Hatha yoga texts discuss "pranayama" in various ways. For example, "Hatha yoga pradipka" in section 2.71 explains it as a threefold practice: "recaka" (exhalation), "puraka" (inhalation) and "kumbhaka" (retention). During the exhalation and inhalation, the text states that three things move: air, prana and yogi's thoughts, and all three are intimately connected. It is "kumbhaka" where stillness and dissolution emerges. The text divides "kumbhaka" into two kinds: "sahita" (supported) and "kevala" (complete). "Sahita kumbhaka" is further sub-divided into two types: retention with
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