Perseverance requires complete of mind, of heart, and of hand in the accomplishment of a certain task. Are there obstacles on the way? You don't mind them. You go on trying.
You have a duty to accomplish. You set about its accomplishment. You apply all your energy in the act. You are fully determined to do right and carry out your purpose in a face of a strong temptation or opposition.
Perseverance is an index of a strong character.