The Inner Reality
Imām Ibn Taimiyyah, may Allāh have mercy on him, said:
The superiority of [some] deeds and their rewards isn’t simply due to the way they look outwardly, but rather their true realities in the hearts [of the ones doing them]; how much better some people are over others in that varies tremendously.
Minhāj Al-Sunnah, vol. 6, p. 226.