This Hadith has an inducement for acquiring knowledge for the Pleasure of Allah alone. If a religious scholar acquires it to make it a means of worldly gains, then it turns to such a serious crime that such a scholar will not even smell the fragrance of Jannah (i.e., he will not enter it along with the saved). May Allah save us from it. However, if a scholar gains wealth and worldly gains through it without any intention, then it is altogether a different matter. In that case, it is not harmful for him as long as he uses it in a manner pleasing to Allah.