Parshas Vaeschanan: How To Break Through With Tefillah
We learned about the koach habitachon that Yitzchak Avinu needed to have in order to daven to Hashem. We also mentioned a yesod from Rav Tzadok that a person could have bitachon for anything that’s al pi teva. That’s why even though Chana did not have children, she was able to daven to Hashem because beteva she could have had children.