The Navi says that Hashem will purify our hearts by removing our “stony” heart and giving us a new, feeling heart. Look how Hashem can change a person! All your Ruchaniyus issues can disappear if you believe in the power of one Parshas Parah. Instead of those ice cold Tefilos, now you daven with feeling, and you can even cry; no more: לֵב אֶבֶן cold heart! I know a person who had major issues with Shmiras Einayim, until he told Hashem: אִל מָלֵא הַקָבָ"ה עוֹז רוֹ לֹא יָכוֹל לוֹ “It is in Your hands to save me from my Ta'avos”.
Before Pesach used to be a time special for getting rid of Ruchaniyus Chametz. It’s a time to daven extra hard, and to work on having the main Bitachon, i.e., in Ruchaniyus. Many, many who suffered from lifetime bad-habits in the wrong direction, like Ka'as and Chanufa and Sheker, have suddenly turned around. The “red” cow which symbolizes sin and bad habits, can suddenly be channeled in the right direction.
The more you Chazzer the words of the holy Navi: ו זָרַק תִ י וגו 'I will purify your heart, etc., the more you believe in their truth; and the more you believe, the more it will happen. R’ Shimshon Pincus Zatzal once took me aside into a room privately, and told me that he Chazered: לֵב טָהוֹר ב רָא לִי אֱלֹקִים thousands of times, and “the entire Shimshon Pincus comes from this”.
