Sean and I were talking about passion, interest and tenacity. He says a CG artist (or vfx artist) are one of those jobs that especially need tenacity to stay long in the industry.
Many jobs only requires you to work hard during the working hours, and you will have gained the required experience to move up and excel in your career. Not for CG. Many times we need to keep practising our craft. Especially when working in a huge pipeline, you may not always necessarily be doing the full spectrum of work you would like yourself to be doing. In many instances we are just doing a very small part, or something else entirely.
To keep ourselves relevant in the specialisation, in the capacity we want our career to move towards, we need to keep "sharpening our blades", and keep doing the things we eventually want to be doing. That is quite a tedious and joyless work if we have no passion, or if we do not have enough determination to do it till we actually get to where we want to go.
This definitely requires perseverance and tenacity.
"Interest makes you work till 8pm", says Sean in these exact words, "but fire makes you work till 4am in the morning."
Incidentally I was working on a piece of music till 5am last night. ;)