Every time we add a lens, it modifies how we experience the world. The difference between that contraption and a world view is that each time a new lens is added to our world view, the lenses remain in place. We must be vigilant about the lenses we admit, because they colour our view of the world, sometimes to our disadvantage. They can limit us, encourage us to seek to confirm evidence and make us hold on to mental models, business models and convictions even when they no longer serve us.

When we realise obstacles are a rite of passage on the journey towards success, we see the them as mile stones rather than mill stones.

You can't change mental models until you change mental models.