[1][5] In 1975, Kripalu bought Summit Station, Pennsylvania, including a health center that became a key element of its mission.[9] Kripalu Center also offers a semester-long program for young adults; projects in music, weight loss and post-traumatic stress disorder.Independent "Kripalu" instructors pay training and certification fees, in return obtaining liability insurance and other business and marketing support.[1][15][16] Kripalu states that its teaching is "following the flow" of prana, or "life-force energy, compassionate self-acceptance, observing the activity of the mind without judgment, and taking what is learned into daily life.[20][21] Kripalu's principal 160,000-square-foot (15,000 m2) building was constructed by the Jesuits in 1957 to replace the Gilded Age mansion "Shadowbrook Cottage."