Consider three concentric rings that represent decreasing safety as you move out from the center.
In the middle is the Zone of Comfort: what you feel completely safe to say or do.
The outermost ring is the Zone of Danger: things you wouldn’t consider doing.
The Zone of Learning: The ring between “comfort” and “danger,” where you are unsure about how another will respond, is the zone in which people learn. Learning at the risk of unintentionally ending up in Danger, test the waters by stretching into the zone of learning by 15%. You can then consider venturing out another 15 % from there.