This quotation contains a figure of speech. What are the exact words that make up the figure. Then is it a personification, simile, or a metaphor.
". . . to run over better waters the little vessel of my genius hoists its sails."
WHY WAS ANSWER CLOSED? "BETTER WATERS" WAS NOT EXPLAINED.
This quotation is a metaphor. It is a metaphor because it compares "your" genius to a boat that is hoisting its sails. This is a metaphor and not a simile because of the way in which it makes the comparison.
If this had been a simile, it would have said something like "my genius is like a little vessel..." In this case, the comparison is made directly, by using the word "like." Instead, this is a metaphor because it just says that your genius is a vessel -- not that it is like one.