The Importance of Love in the Teaching of Islam

People like Bukhara used to check the biography. Did these people exist? You know, who were they? Could they have met the person they claimed to receive knowledge from? There was an attempt to make this a solid process, I guess. And that's what one in a sense ends up with. If you want to be a scholar of Islam, he has to take on all of this baggage. Now, I just wonder, was it like that in the beginning?