Few things are impossible to diligence and skill.

Most walls turn out to be doors that need patience and competence applied for longer than feels reasonable. Not all of them; some things really are out of reach, and pretending otherwise is its own kind of trap. But the honest count of genuine impossibilities is small, and most of what we file under impossible is actually under-attempted. Skill without persistence stalls, and persistence without skill grinds.

Take something you have written off and ask which of the two it lacked. If it was time, give it a longer run. If it was capability, spend the week getting better at the specific part that stopped you.