Why not? Because their pursuit was not by faith, but as if it were by works. They stumbled over the stumbling stone,
Διὰ τί; Ὅτι οὐκ ἐκ πίστεως, ἀλλ᾿ ὡς ἐξ ἔργων νόμου· προσέκοψαν γὰρ τῷ λίθῳ τοῦ προσκόμματος,