Dharma Q&A with Venerable Guan Cheng (Episode 22)

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

Is it true that the Buddha and his disciples were not vegetarian. They had to ask for food on alms round and therefore had to eat anything that was given. Some gave meat and non-vegetarian food into their bowls.
If you are trying to explain Buddhism to someone, but he is reluctant, what should you do? Do you persist or stop?
What is the Buddha of Medicine Ceremony?
I'm not as wise as Subhuti, and even though I've been practicing for over a year, I have not been successful with quieting the voice in my head. What do you suggest me to do?
If future, present and past are semantics in representing the concept of time, does it mean that they don't exist?
What are The Five Contemplation While Eating?