Full Idea
The courage of spirit is the most natural kind; for spirit is unconquerable, which is why the young are the best fighters.
Gist of Idea
Courage from spirit is natural and unconquerable, as seen in the young
Source
Aristotle (Eudemian Ethics [c.333 BCE], 1229a27)
Book Reference
Aristotle: 'Eudemian Ethics', ed/tr. Reeve, C.D.C. [Hackett 2021], p.38
A Reaction
[thumos, presumably, as in Plato] I suppose Aristotle knows better than me, but I suspect the young are just the quickest and strongest. I'd rather be led by someone with experience than by someone who is young.