If you believe that the scientific line of inquiry alone will be the only way forward in discovering the truth about the nature of reality, then study everything that is at your disposal. Everything. Do not discount emotions, thoughts, imaginings, dreams, memories, intellect, physical perception, physiology, in fact experiences of any nature, so that you can be sure that you have fully engaged with the whole gamut of your human existence and not missed anything out. Every last particle within your being and of the environment around you, and every last thought is worthy of your questioning, and exploration. How you choose to do that is up to you, and you are perfectly well equipped to do so already. All you have to do is ask the question to begin that process of discovery.