Sometimes when we are rejected, we become dejected. When that happens, see if you can continue with one foot in front of the other, as Albert Einstein did.
In 1905 Albert Einstein wrote his famous Special Theory of Relativity. It was published in a scientific journal that same year, but took many years to gain general acceptance. In fact, it was not proven by actual experiment until 25 years later.
Two years after that paper was published, Einstein wanted a job as assistant professor of mathematics. This job required the applicant to submit a thesis paper, so Einstein submitted his Special Theory of Relativity. The university rejected it.