Joel is an example of a leader who managed to understand the times and their events correctly, and to translate them in a way people could grasp. His God-given intuition helped him stay one step ahead and lead in a wise way.
Intuition is like starting a race with a head start. It can even make it possible to beat the fastest sprinter in the world. Joel used this advantage in knowledge, worked out a plan for dealing with the coming disaster, and passed it on to the people.
Joel 1:14 Sanctify ye a fast, call a solemn assembly, gather the elders and all the inhabitants of the land into the house of the LORD your God, and cry unto the LORD.
This passage is an example of how God uses natural events to illustrate spiritual truths.
Joel 1:6-7
6 For a nation is come up upon my land, strong, and without number, whose teeth are the teeth of a lion, and he hath the cheek teeth of a great lion.
7 He hath laid my vine waste, and barked my fig tree: he hath made it clean bare, and cast it away; the branches thereof are made white.