As long as you tell yourself that you can’t, then you won’t. You have to stop focusing on the limits and start focusing on the possibilities.
Self-defeating thoughts will kill your ideas way before they even have a chance. Remember, creativity is a skill that needs to be developed over time. You very well may have an idea that you do not yet have the ability to transform into reality… yet being the key word. But the attempt(s) will invariably result in personal growth. You will be more creative for having attempted and (debatably) failed than you would have been sitting still, thinking about all the reasons why you can’t. In creativity there is not failure, there is only progress.
If you find yourself facing a creative challenge view it as an opportunity to grow. You very well may need to go learn a new skill, recruit some help, find a mentor or take a class. You may need to wait for your technology to be invented, or your protégé to be born. You may need to walk away and come back later… maybe even much later before you are able to continue pushing your idea toward a reality, but there is no such thing as a creative impossibility.
The way I see it, in creative arenas, “I can’t do it” should always be followed with the qualifier “yet”.

