If you inquire into the background of experience, or its preconditions, what experiencing already had to already be 'there' so that experiencing can 'take place' then you are treating it as a concept. It is concepts which necessarily have antecedents out of time. The alternative is to isolate the being of experiencing from all thought and all feeling, from causes and purposes, and discover whether and what it demands apart from itself. What is the world native to being?