Without goals we will not be moved to live / do something, everyone would need a goal of life / goal to be achieved, but there is a negative side that rarely realize people when pursuing a goal that is the illusion of focus or better known as focusing illusion. Focusing illusion is when one is too concerned with one aspect of his life so that they tend to ignore the other factors, so we are overestimated in that one thing.
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From @elisa30