God changes situations to be better. We sometimes handle situations ourselves but we may come to a situation where we cannot do it on our own.
Sarai married Abraham
God promised Abraham that he will have many descendants, like the sand on the desert.
Abraham has a lot of faith in god, during a time where people have many idols.
Sarai was infertile.
Palestine had no water. Abraham went to Egypt. Sarai was taken by the pharaoh. And everyone in the palace were inflicted with sores. Sarai explains she has a husband and if the Pharaoh releases her everyone will be cured.
2) Sarai has great faith.
1 Peter 3.5
3) Sarai respects Abraham
4) Sarai has good intentions
Genesis 16.1-2
She let Hagar have baby for her and the child was caught is Ishmael
5) Sarai at the biggest problem. Infertility
Romans 4.18 - 19
Abraham continued to believe in God, and His promise.
But humans cannot do, God can do.
Subsequently, Sarai conceived when she was 90 years old and Abraham was 100