He influenced them (The Beatles) all tremendously. They had a great amount of respect for him. He seemed to have almost a dual personality. They knew they could rely on him to look after and guide them; on the other side of his personality, when he wasn’t working he was ready to play. Whatever they would take or smoke, Brian would be there as well. So he could pull both sides together very well. When he relaxed, he relaxed completely. I just adored him.
Pattie Boyd on Brian Epstein
(Source: Brian Epstein: The Man Who Made The Beatles by Ray Coleman)