In our Genesis passage we are reminded that sin is serious and that it's consequences can be long lasting and affect many more people than just ourselves.
Sarai sinned by not trusting God to fulfill His promise and presuming to know a better way and timing, offering Hagar to Abram as a surrogate in order to force God's hand.
Abram also sinned in this. He also doubted God's promise, he listened to his wife's ungodly advice because he failed to test it against God's Word, he didn't pray or ask God for wisdom, and obviously, he slept with another woman that was not his wife (or took a second wife - but either way, not God's plan and therefore, sin).
And the consequences were huge! Hagar was forced into becoming Abram's mistress/concubine/wife. There was pride, jealousy, misery, and injustice throughout the entire situation between Sarai, Hagar, Abram, Ishmael, and later, Isaac.
Isaac is the ancestral father or the Israelites, and Ishmael is the ancestral father to all Arabic people - two nations that are at war with each other from that point on until today. Talk about far reaching consequences!!
Forgiveness does not cancel out consequences, and we would be well served to remember that before giving in to the temptations we face today.
Our NT passage discusses a few of those temptations/sins - lust, divorce, oaths, and revenge. But the portion that stood out to me is that believers are to love their enemies. Perhaps there is nothing that differentiates unbelievers from believers as much as this! Obviously, this is something that we can only do through the power of Christ that lives within us. Who do you need to love today?
Tomorrow's Bible In a Year Passage: Genesis 18-19; Matthew 6:1-18