Really? If you simply say to your students, "When you have it, you know it," how does that help them?
it helps the student to learn how to sound wise so they can do the same thing when their turn come. sort of along the line "take the pebble from my hand. when you have it, you know it." similar to ki, when you have it, you know it..... so are all the folks within a few meters radius, know it too. unless, you take preemptive measure by yelling at the person near you: "would you stop projecting your ki??!!!!"