Dharma Q&A with Venerable Guan Cheng (Episode 13)

In this episode, the Venerable addressed the following questions from the audience,

How do we know if reincarnation exists? Are concepts like reincarnation and Karma similar to Heaven and Hell in Christianity as moral guidance?
Can you explain the difference between Pure Land and Nirvana?
Can you please explain the meaning of "Om Mani Padme Hum"? 
Is it possible for beings in the animal realm to go up to Nirvana? Or must they go to the human realm first? 
What kind of help can you get from Buddha without you doing something to achieve your goal? For example, if you have sickness, you need to go to the doctor, not only doing good deeds, meditation, and having faith. 
I hope that I'll not have to be reborn again. But in case I do, is there anything I can do in this lifetime to help ensure that I can be reborn in the Buddhist surroundings, so that I can quickly get back to the right path?