Namaste isn't merely a greeting. It has a deep, divine meaning. Literally, it means 'The highest in me bows down to the highest in you'. The 'highest' here refers to the Divine Life Force Energy or the Supreme Wisdom that runs the entire universe. Essentially, it means not just perceiving someone based on their external features or possessions; but recognizing their soul as a part of one universal existence. It also means that everything that exists in the universe is a part of the whole; and is in oneness with the Supreme Wisdom.