Some of the world’s greatest feats were accomplished by people not smart enough to know they were impossible. (Doug Larson, 20th century newspaper columnist)
“I don’t think it can be done” might well be the motto of the wanna-be inventors who can’t ever seem to pursue an idea to its conclusion. It isn’t necessary to be dumb (“not smart enough”) to give up too soon. It’s just the lack of persistence—the drive to keep at a promising project—that dooms many good intentions. Keep working at it!
Whatever you do, work at it with all your heart, as working for the Lord, not for human masters (Colossians 3:23).