Answer:
No, you cannot succeed without constant development.
Step-by-step explanation:
You can't because you need to constantly change in order to do better, like for example:
If you play a sport that you've never played before, you are going to be terrible at it at first. If you don't develop those skills, you will never get better.
Same goes for anything else in life: When you get a job, you will need to to a lot of things, and you will need to constantly develop to o a good job, or if you want to promote, you will need to be better and better, but you won't succeed in your goals if you are not constantly developing.