In the Merit of Bitachon

The Ramban wrote that if a person lacks the merit to deserve having his tefillah accepted, the mere fact that he affirms his trust in Hashem repeatedly and believes that Hashem wants him to daven again and again makes him worthy of having his tefillah answered.

(Harav Yosef Shaul Nathanson, cited in Likutei Basar Likutei)