بسم الله الرحمن الرحيم
Ibn Al-Qayyim – rahimahu Allah – said:
Likewise, from among them [i.e. the causes that alleviate the chest], indeed from the greatest of them is removing contaminations of the heart; the blameworthy characteristics that bring about it’s [i.e. the chest’s] tightness and agony, hindering it from recuperating.
For indeed if a person adopts the avenues that [are intended to] alleviate his chest without actually removing those blameworthy characteristics from his heart, then his attempt at alleviating his chest will be useless.
The end result of the person, is that he has two opposing elements that are repeatedly affecting his heart, he belonging to the predominant element of the two.
Source: Ibn Al-Qayyim, Zaad Al-Ma’aad, Chapter: Concerning the causes of alleviating the chest, [of which] complete and perfect acquisition belongs to him [i.e. the Messenger] ﷺ