James Randi, Antonie van Leeuwenhoek, Friedrich Nietzsche, and even Harry Houdini encouraged us to consider our thinking. Why can we be fooled and why do we sometimes not believe what is right in front of ours. There is also the question of what do we believe and what do we want to believe. All things that can best be answered by gazing long into ourselves – and this, again and again, is what Patanjali recommended.