What it means
By tradition, Neptune's sign is a generation's dream: what it idealizes and later gets disappointed in. In Aries it is the ideal of the hero and the first step: the belief that one bold act changes everything.
The flip side, by the same tradition, is the illusion that courage solves everything. How this will show up in the generation will become clear when it grows up; the previous Neptune in Aries fell in 1861–1875.
Not about you if you were born before 2025: Neptune in Aries is only for children born from spring 2025.