An explanatory saying transmitted from ʿAbd Allah ibn Masʿud distinguishes the two seekers: seeking beneficial knowledge can lead toward Allah’s pleasure, whereas unchecked pursuit of the world can lead into transgression. The saying is attributed in the commentary to al-Darimi; it should not be confused with the wording of Hadith 50 itself.
صَاحِبُ الْعِلْمِ means the possessor or seeker of knowledge; صَاحِبُ الدُّنْيَا the one attached to worldly life; لَا يَسْتَوِيَانِ means “the two are not equal.”
The distinction is not simply that both want more. It lies in what they seek and what that pursuit produces: beneficial learning can guide action, while unrestrained worldly desire can encourage wrongdoing.