How to reconcile these two quotes?

“If a man knows not which port he sails, no wind is favourable.” Seneca

But then see this:

“Would you tell me, please, which way I ought to go from here?”
“That depends a good deal on where you want to get to,” said the [Cheshire] Cat.
“I don’t much care where—” said Alice.
“Then it doesn’t matter which way you go,” said the Cat.
“—so long as I get somewhere,” Alice added as an explanation.
“Oh, you’re sure to do that,” said the Cat, “if you only walk long enough.”

—Chapter 6, Pig and Pepper