Meaning of "it takes a measure of doing"?

Question

In the novel *Dune* by Frank Herbert, it says:> "Some day, lad," the old woman said, "you, too, may have to stand outside a door like that. **It takes a measure of doing.**"What does it mean?

Answer 1

To say this sentence in a different way, "It takes a lot of doing." Essentially, it's saying that standing outside that door is in some way difficult or intimidating, such that it requires a lot of physical or mental effort.