Being a.negative minded person makes you pesimistic.You'll always see the "glass" half empty never the other half which you'll get you closer to your targets that you wish to achieve.Negative people always put the bad ahead of all things surround them therefore they cannot see the bright side of life and their posibilities in succeeding become limited,sometimes imposible.Not having an open-minded,larger and wider prospective of life in general means you aren't an ambitious person and this can slow down achieving your goals.