You can never possess mountains for God unless you have a positive attitude. Though the word of God says that you can possess the nations for your inheritance, you can be like the rest 10 spies who say we cannot possess the land and they perished in the end.

But Caleb had a positive attitude, the word of God said, but my servant Caleb, because he had another spirit with him, and hath followed me fully, him will I bring into the land whereinto he went; and his seed shall possess it. Numbers 14:24 KJV