Firm as a stub or stump; stiff; unbending; unyielding; persistent; hence, unreasonably obstinate in will or opinion; not yielding to reason or persuasion; refractory; harsh; -- said of persons and things; as, stubborn wills; stubborn ore; a stubborn oak; as stubborn as a mule.
What is exciting is not for one person to be stronger than the other... but for two people to have met their match and yet they are equally as stubborn, as obstinate, as passionate, as crazy as the other. Barbra Streisand
Failed plans should not be interpreted as a failed vision. Visions don't change, they are only refined. Plans rarely stay the same, and are scrapped or adjusted as needed. Be stubborn about the vision, but flexible with your plan. John C. Maxwell