"I think some of it comes down to a misunderstanding of evangelization versus proselytization," Sartori told CNA.
Proselytization, Sartori said, happens when "the person is preaching or going out to be heard, not listening to someone but rather just trying to get a point across."
Evangelization, on the other hand, is "about building trust, encountering a person, understanding a person, and introducing them to Jesus and proposing ideas, as opposed to just telling them something."
Sartori said the way millennials answered this question also reflects the current political climate and a culture that prioritizes people's comfort over everything else.
"In this culture of 'if you disagree with me you hate me,' I would say most millennials would say: 'I'm not trying to convert anyone,'" Sartori said.
"But I would hope everyone is trying to convert someone, it's just that there's a right and true way, and then there's a way that's just kind of yelling at people, and that's obviously not what I'm about and not what anyone would desire. And I think in general millennials are really sensitive to that."
Klein also said that millennials are reacting to the polarization that characterizes the political and social media world of today.
"Actual authentic dialogue has in fact broken down, and I don't think that's a delusion of millennials; things are often so polarized that it is very difficult to have a dialogue which is perceived as open and a back and forth, and not somehow inauthentic or aggressive," she said.
"It's not that they don't want to share their faith, but it seems that sharing via dialogue or speaking makes people uneasy, and I don't think that's inexplicable, that seems to make sense," she said.
Part of the training of FOCUS missionaries is teaching them how to evangelize, Sartori said - which includes building friendships and trust with people before proposing that they consider going to church or learning more about Jesus.
"The three habits (taught to missionaries in training) are the things we emphasize that help us to go and do evangelization," Sartoir said. "The first is divine intimacy (with God), the second is authentic friendship, and the third one is clarity and conviction for what we call spiritual multiplication. So this idea that you're investing deeply in a few people, and sharing your faith in a way that they can then go and do that with others."
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"You're listening, you're building trust, you're speaking in a way that they're going to be able to hear you," Sartori said, "but you're also hearing where they're coming from on things."
Once a friendship is established, Sartori said one of the easiest ways to talk to someone about God is to ask them about the faith tradition they had while they were growing up.
"It's the basic questions of like - did you ever go to church growing up? Something like that that's less attacking than, say, 'How do you feel about abortion?' or something that's more politicized or a hot topic," Sartori said. "You want to do something that's a softer, more inviting conversation, so you can just understand the person."
After a conversation about faith has been opened, then it can be time to invite someone to events at a parish or into a Bible study, if the person is open to it.
"While there's an urgency for someone to accept the Gospel as quickly as possible, we also want to propose it and not impose it, so we're not going to rush into anything on that," Sartori said.
Klein said millennials are also most likely to be tuned into the need for authentic witness - that someone must be living a personal life of holiness and friendship with God before they can propose it to someone else.