The Six of Wands is illustrated by the White Eagle of Zeus, a messenger of the gods. The glowing wands emerging from Zeue's hands seem to indicate the power and energy of the Wands suit, while the eagle spreads its wings, about to set off to communicate with mortals and allow them to touch the gods.
It's an interesting idea when compared with the image of the Rider-Waite deck: a man on horseback proclaiming his victory, wreath and all. It's as if our victories get us closer to the Divine itself. Acknowledging our power, our ability to achieve the things we desire, makes us feel like we've touched something godly. Or isn't that the reason for the legend about the parades in Rome, where there'd be someone asked to stand next to the victorious general and whisper in his ear, "Remember, thou art mortal."
The Six of Wands is numbered six of ten. It's only in the middle of the path. But I don't think that's because the next steps are the fall of mortal men. I don't even think it's because in the Rider-Waite, the Ten of Wands is someone being crushed under the burden of too many responsibilities and expectations.
I think that achieving all we are gets us closer to the Divine - but really, we were divine already. Our achievement brings us in communion with the gods because we remember our ability to manifest wonderful things. We remember our connection to a world that works with us, not against us.
That may seem materialistic, selfish even. But only if you think the point of achievement is to get "stuff", money, goods, or accolades that have no meaning beyond the idea that you have it. Our deepest victories aren't the simple idea of money in our bank accounts, or a trophy on a wall. They're how we worked to achieve that thing, something we'd never imagined to be possible before. They're how money is one road to more time with our families, or more freedom to discover and grow beyond our current limitations.
Who's to say our victory has to be material things or accomplishments? Our best achievements are inside us, discovering all we're capable of, all we can grow to be. And if that's not touching the Divine, I don't know what is.