Genesis 18:12

Therefore Sarah laughed within herself, saying, “After I have grown old, shall I have pleasure, my lord being old also?” (Genesis 18:12 NKJV)

What did Sarah do when The Lord said she was going to have a child? She laughed. She, being 89 and her husband 99, thought they were too old to have, or even to try having a child. She did not believe God. It seemed impossible. Has God told you something that seems impossible? How did you react? Even though Sarah laughed, and got reprimanded after lying to try and cover it up, she still did it in faith that God's word was true. Read Matthew 21:28-31.