Nouns ending in -age are usually masculine.
The suffix often marks an action, a result, or a collection.
Is courage masculine or feminine?
lecourage
The rule behind it
98.8% of -age nouns are masculine
In context
Son courage fut célébré dans tous les journaux.
His courage was celebrated in all the newspapers.
Il faut du courage pour changer une habitude.
Courage is needed to change a custom.
J'ai du courage et une forte volonté.
I have courage and a strong will.