Persistence is often the key to success: true.
Perseverance and determination are elements that contribute to the achievement of every important goal: true.
Nevertheless we humans have a tendency to interpret every act of purposefulness with something else: stubbornness.

Stubbornness is the force that drives us to be self-righteous and
100% convinced of something even when we are completely and objectively
wrong.
Diligence and fortitude are essential for achiev...