Dharma Q&A with Venerable Guan Cheng (Episode 4)

In this episode, Venerable Guan Cheng discussed his attachments and non-attachments to the temple he built, and answered the following questions: 

Should one attach to Dharma? 
How do we know there is reincarnation and karma? 
Why does the sutra suggest to offer alms to one who does nothing, thinks nothing, practices nothing and manifests nothing? 
Does one need to become a monk or nun to stop reincarnation? 
Since Arya Avalokitesvara said he won't rest until everyone is saved, does that mean we will eventually be saved? 
Is the total number of sentient beings in the universe fixed?