So，as the little prince described it to me, I have made a drawing of that planet. I do not much like to take the tone of a moralist. But the danger of the baobabs is so little understood, and such considerable risks would be run by anyone who might get lost on an asteroid, that for once I am breaking through my reserve. "Children," I say plainly, "watch out for the baobabs!"
The Little Prince
I don't quite understand the phrase "breaking through my reserve" in this context. Is it a common phrase in daily usage?