Say you are my sister, so that I will be treated well for your sake and my life will be spared because of you.
Genesis 12:13 (NIV)
This passage reveals to us in a way the weakness of Abram or, in other words, his lack of faith in the promises of God to take care of him. Going to Egypt because of the famine, if you read from verse 10 to 20, you will see that Abram, fearing that he would be killed by the Egyptians, asks Sarai to say that she is his sister. He relied on his wife rather than on God.
Abram's decision to save his life by lying cost the lives of the entire house of Pharaoh, upon whom God sent a plague. The passage tells us that Abram did not lose his life, but he was publicly humiliated and rejected by Pharaoh who had him escorted out of the country. All he had to do was trust God, just as he had done before when God told him to leave Ur.
This situation is no different from that of many Christians who choose to lie rather than trust God. Whether they seek to protect their prestige, reputation, social status or position, believing themselves to be intelligent enough, they use their own means to achieve this instead of trusting God.
I tell you today, God knows your situation and He already has a plan for you, so don't try to find a solution, but trust Him because He never fails His promises.