Seven traits define the tamasic doer: unsteady, narrow-minded, stubborn, dishonest, harmful, depressed, and always putting things off. This person neither moves forward nor lets others move forward.
The word 'dirghasutri' is vivid — literally, 'one with a long thread.' It describes someone who stretches every task, postponing today's work to tomorrow, and tomorrow's to the day after. That chronic delay is the signature of tamas in action.
Every person carries traces of all three gunas. Krishna lists these traits not to label anyone permanently, but so that each of us can recognize which tendencies hold us back — and begin to work past them.