There are several theories for this. One theory says that the phrase "God Bless you" came from an Islamic practice which originated over 1400 years ago. According to the Islam religion, when someone sneezed, he should say "All Praises to God" and in response the people would reply "May God Bless You". Another explanation is that when people sneezed it was believed that the heart would miss a beat; in that microsecond, the skip would allow the devil to enter the body. Therefore, saying "God bless you" would stop the devil from entering one's body uninvited. Another middle ages superstition held that, when one sneezed, a large amount of breath (regarded as the very breath of life) could be expelled suddenly from the body, resulting in death. In case the victim died in this instance, he/she would at least go to heaven with God's Blessing.