There are two doors ten feet apart: One door leads to Heaven, and one door leads to Hell. In between both doors are two guards; one who always tells the truth, and another who always lies. Only these two guards know which door leads to Heaven, and which to Hell. What question can you ask both guards to find out which door leads to Heaven?
Answer:
Which door would you tell me leads to Heaven?
I call heaven and earth to record this day against you, that I have set before you life and death, blessing and cursing: therefore choose life, that both thou and thy seed may live: Deuteronomy 30:19
