The title means that educated people have more opportunities. “To have more arrows in your quiver” means “to have more opportunities”.
Look at the phrases below. Note that each is phrase is longer than the previous one:
Educated people have opportunities.
Educated people have more opportunities.
Educated people have more opportunities than uneducated people.
Educated people have more opportunities than people who lack education.
Educated people have more opportunities than people who are lacking education.
Educated people have more opportunities than people who are lacking in education.
Educated people have more options at their disposal.
Educated people have more arrows in their quiver.
A Metaphor from the Field of Archery
The terms arrow and quiver in the title of this page are a metaphor from the field of archery.
Have you ever done archery?
Archery – Bows and Arrows
Shoot or Fire
The verbs “shoot” and “fire” can both be used:
Have you ever shot a bow and arrow?
Have you ever fired a bow and arrow?
Field of Meaning
Let’s look at the words in this field of meaning:
Weapons for War and Hunting
Is there a war in your country?
A bow is usually a long curved piece of wood with a string on it.
An arrow is a projectile which is fired from a bow. It has a sharp point.
A quiver is the case which is used to hold arrows.
When we say an educated person has more arrows in his quiver, we mean that person has more opportunities. The arrow represents opportunity. The quiver is the container of opportunities.
Look at these variations:
The archer fires the arrow.
The arrow is fired by the archer.