Whether we realise it or not, we are masters of influencing our state of mind (and therefore the quality of our thoughts). While we might come up with all manner of rationalisations, as any advertiser knows, we are driven by our unconscious desire to move away from things that feel bad and towards things that feel good. Think about how much time and money we spend as a species on drugs, alcohol, sex, religion/spirituality, entertainment, therapy and the rest. Is this the resu