"Namaste" is an Indian greeting commonly combined with a bow. According to Wikipedia it means:

• "I bow to that inherent in you" ("That" refers to divinity, or that which is divine')
• "I respect divinity within you that is also within me." (Here, "that" refers to divinity, or that which is divine.)
• "The Light within me honors the light within you."
  

It is derived from Hinduism but it has multi-religious usage. I've heard it described as "I Honor the Holy One who lives in you". It reminds me of when Christ said, "whatever you did for one of the least of these brothers of mine, you did for me." We are Christ's representatives but we also see Christ in others around us.

I believe that there is truth everywhere. God has given everyone grace even if they don't accept Christ as their savior. To the critics, I am not saying everything is true but I believe there is truth in everything. Even if something is not true we can learn from it. I've heard someone say that Jews used to come at things with a different perspective. When they encountered something they didn't ask, "Is this true?" but "What can we learn from this?" I think this is a smart way to live life. When we see something or read something or watch something we don't have to agree with it but we can learn something from it. This is our way of peeling back layers to expose truth in "secular" things. It may be in a movie or book or song. We may review something or talk about a quote from a "non believer" or a song by a "Heathen". It may be Gods way of showing people Truth through alternate means. He's used a donkey before, why not a band or a movie? Paul was at Mars Hill and preached using their poets and shrines to "The Unknown God." This tells me Paul knew of their evil pagan culture and used it to speak truth. We can do the same thing. Use their poets. Use their shrines. Whether it is by a Christian or not we can often learn something, and we can teach others something. This is our way of saying, "I honor the God/the truth/the light I see in you"