\begin{tikzpicture}[rounded corners]
\graph [simple necklace layout,
edge quotes mid,
edges={nodes={font=\scriptsize, fill=white, sloped, inner sep=1pt}}]
 {
Father[nail at={(0,3)}] <->["is", blue, text=black] God[nail at={(0,0)}];
Son[nail at={(-3,-2)}] <->["is", blue, text=black] God;
Holy Ghost[nail at={(3,-2)}] <->["is", blue, text=black] God;
Father <->["is not", red, text=black] Son <->["is not", red, text=black] Holy Ghost <->["is not", red, text=black] Father;
Father -> ["paternity", bend right=22.5, green, text=black] Son;
Son -> ["filiation", bend left=45, green, text=black] Father;
Father -> ["active spiration", bend left=22.5, green, text=black] Holy Ghost;
Holy Ghost -> ["passive spiration", bend right=45, green, text=black] Father;
Holy Ghost -> ["passive spiration", bend left=45, green, text=black] Son;
Holy Ghost <- ["active spiration", bend left=22.5, green, text=black] Son;
 };
\end{tikzpicture}
