Lying can result in a few different punishments: lashes, payment, or sometimes even death. So why on earth did HaShem lie to Avraham in the beginning of the Parsha? After being told she will have a child, Sarah responds, “My skin is withered and my husband is old.” Immediately following that Passuk, HaShem says, “Why is it that Sarah laughed, saying: Shall I in truth bear a child, though I have aged?” HaShem tells Avraham that she called herself old while in truth she called Avraham old. How can this be?
To be honest, I don’t want you to think that I have an answer for situations which you are allowed to lie in. Though, I do know that HaShem lied for peace. He found it more important to lie than to have Avraham be even slightly upset at Sarah for saying such a thing. In all honesty, it’s not like she even lied. Avraham was way too old to have a child, yet HaShem found peace between 2 people more important than the truth.
We live our lives, whether we lying or not, talking about others. The words we say can cause a person to feel hatred towards another person. The ONLY way we can refine this world and create a peaceful one is by loving one another, or at least not doing things that cause others to feel hate towards each other.