Thes Beatles are giving up drugs to become practical philosophers of the present century (The Beatles Anthology by The Beatles p. 263)
PAUL McCARTNEY: There was a press conference. It was suggested that as we were going with the Maharishi, it might be a good idea to accommodate the press, it also saved them waiting around outside our windows. I don't remember that we specifically said that we'd given up drugs - but at the time I think we probably had, anyway.
GEORGE HARRISON: LSD isn't a real answer. It doesn't give you anything. It enables you to see a lot of possibilities that you may never have noticed before, but it isn't the answer. You don't just take LSD and that's it forever, you're OK. To get really high, you have to do it straight. I want to get high, and you can't get high on LSD. You can take it and take it as many times as you like, but you get to a point that you can't get any further unless you stop taking it.
PAUL McCARTNEY: You cannot keep on taking drugs forever. You get to the stage where you are taking fifteen aspirins a day, without having a headache. We were looking for something more natural. This is it.
It was an experience we went through. Now it's over and we don't need it any more. We think we're finding other ways of getting there.
GEORGE HARRISON: It helps you find fulfilment in life, helps you live life to the full. Young people are searching for a bit of peace inside themselves. 
JOHN LENNON: Don't believe that jazz about there's nothing you can do, and ‘turn on and just drop out, man' - because you've got to turn on and drop in, or they're going to drop all over you.
GEORGE HARRISON: We don't know how this will come out in the music. Don't expect to hear Transcendental Meditation all the time. We don't want this thing to come out like Cliff and Billy Graham. 
MAHARISHI MAHESH YOGI: I can train them as practical philosophers of the present century, something very great and of use to the world. I see the possibility of a great future for them.