Knowledge without action leads to spiritual ruin

وَٱتْلُ عَلَيْهِمْ نَبَأَ ٱلَّذِىٓ ءَاتَيْنَـٰهُ ءَايَـٰتِنَا فَٱنسَلَخَ مِنْهَا فَأَتْبَعَهُ ٱلشَّيْطَـٰنُ فَكَانَ مِنَ ٱلْغَاوِينَ

And recite to them, [O Muḥammad], the news of him to whom We gave [knowledge of] Our signs, but he detached himself from them; so Satan pursued him, and he became of the deviators.