"Maybe not. Maybe, just maybe, there's something they've missed that's important. With patience and calm, even a burro can climb a palm." This last was one of her many Dominican sayings she had imported into her scrambled English.

What is the meaning of the idiom underlined in the excerpt?

Anything can be accomplished.
Anyone can make money.
A little encouragement goes a long way.
Every story needs to have a point.