*** w05 3/15 p. 18 par. 8 “You Were Bought With a Price” ***
8 Consider the example of Elena, a young Christian in Spain. She had several classmates who were blood donors. They knew that Elena, one of Jehovah’s Witnesses, would not donate blood or accept blood transfusions. When an opportunity arose to explain her position to the whole class, Elena volunteered to give a presentation. “Frankly, I felt very nervous about doing this,” Elena explains. “But I prepared well, and the results were surprising. I won the respect of many of my fellow students, and the teacher told me that he admired the work I was doing. Above all, I felt satisfied that I had defended the name of Jehovah and had been able to explain clearly the reasons for my Scriptural stand.” (Genesis 9:3, 4; Acts 15:28, 29) Yes, as slaves of God and of Christ, we stand out as different. However, we may well win people’s respect if we are prepared to defend our beliefs respectfully.—1 Peter 3:15.
*** w00 10/15 pp. 30-31 Questions From Readers *** Occasionally, a doctor will urge a patient to deposit his own blood weeks before surgery (preoperative autologous blood donation, or PAD) so that if the need arises, he could transfuse the patient with his own stored blood. However, such collecting, storing, and transfusing of blood directly contradicts what is said in Leviticus and Deuteronomy. Blood is not to be stored; it is to be poured out—returned to God, as it were. Granted, the Mosaic Law is not in force now. Nevertheless, Jehovah’s Witnesses respect the principles God included in it, and they are determined to ‘abstain from blood.’ Hence, we do not donate blood, nor do we store for transfusion our blood that should be ‘poured out.’ That practice conflicts with God’s law. *** km 11/06 p. 4 How Do I View Blood Fractions and Medical Procedures Involving My Own Blood? *** Why are some procedures involving the medical use of my own blood a personal decision? Although Christians do not donate or store their own blood for transfusion purposes, some procedures or tests involving an individual’s blood are not so clearly in conflict with Bible principles. Therefore, each individual should make a conscientious decision as to whether to accept or to reject some types of medical procedures involving the use of his or her own blood. These were the most recent mentions I could find, although none actually spell out *why* it's supposedly wrong.