How does God respond to human unbelief?

Genesis 18 illustrates that even when faced with Sarah's laughter of doubt, God responds not with anger but with affirmation of His promise to return and fulfill it. This interaction underscores God's patient and gracious nature; He recognizes human frailty and doubts but remains steadfast in His commitments. As believers, this highlights that God understands our struggles with faith and unbelief and yet continues to assure us of His power and purpose, fostering growth in our faith journey. This gracious response invites believers to bring their doubts before God, trusting in His ability to strengthen their faith.