The word "slavery" has a negative connotation, largely due to the exploitation (or abuse) associated with it in the past few centuries. However, if slavery is chosen by a person on one's own volition leading to one's own benefit (or for larger good), then it is acceptable and it is sometimes praiseworthy. We indulge in such "slavery" often in life as in the case of an individual bidding the orders of superiors even if it means going against once own conscience: it is seen in armed forces, any organization, a family or in practicing religion also.
