As-Salaam alaikum,
We have it in the Holy Qur'an where it is stated that:--

"Verily, in the remembrance of Allah do hearts find rest/satisfaction" (13:28)

And in Hadith, we had it in the Sahehayn where the Noble Messenger of Allah, Sallallahu alaihi Wasallam, said that:--

"There is a piece of flesh in the body, if it becomes good (reformed), the
whole body becomes good but if it gets spoiled, the whole body gets
spoiled and that is the heart."

Imam Abu Abdullah at-Tirmidhi Hakeem, may Allah be Merciful to him, also said that: "The Zikr [remembrance] of Allah moistens the heart and cultivates tenderness in it. When the heart is bereft of Zikrullah, the heat of the nafs overtakes it; the fire of lust reaches it and becomes barren and hard."

Indeed, the life of the heart (qalb) is related to Allah Ta'ala's remembrance. Man has only to implant Allah's Name firmly in his heart, and what follows is amazing. So, be engaged in Zikr always or most of the time.... With that you find out that even though our hands cannot feel Allah, the mind cannot grasp Him, but the heart would vividly recognize Him.

With regular and/or constant Zikr, the heart can discern Allah Ta'ala... hear, entreat, obey Him and act in accordance with His Will, Jallah-Jalalahu.