All Good

Rashi explains that every year of Sarah's life was all equally good !

How can we understand that ?

Was she as happy before she had a child as afterwards ?

The answer is Gam Zu Ltovah. Yes , she did pray always for a child. But she also understood that until Hashem grants her request , He was giving her what was best for her for now !
Now may be a good time for a gem of Torah study.
www.GemsofTorah.com