When we say dichotomy we talking about contradiction for example, say light and dark. There are many way to look at this. One fundamental way is like this :- You know there is light right now only because you have seen darkness. Suppose 24 hr. from your childhood there is light then you would never know light! So, you know light because you some way tested darkness, you know white because you have seen black, you know men because you seen a women, you know what a day because seen night. So, what seem to be contradictory in logical level of your mind, in term of making life they are complimentary to each other. They are working with each other but pretending to be opposite to each other. If you live here in a very necessary perception, in very brief amount of time one can realize, this contradiction can go on playing endlessly upon you without taking you anywhere.
What is and what isn't everything is you. An unexplored direction kept calling you all the day.