A bedrock concept of Judaism is that a man’s fate is in the hands of Heaven. As the saying goes ‘Every bullet has its address.” So when a person’s time comes, or a person deserves to be taken as result of his sins, we are taught that there isn’t much that can be done to prevent it.
For this reason, the Talmud urges one not to place himself in mortal jeopardy or in a life-threatening situation. One may not say, “A miracle will be performed for me,” perhaps one is not forthcoming. (Ta’anit 20b)