Whoso boasteth himself of a false gift,.... Of his charity and alms deeds; bragging of great things he does this way, when he does nothing; or who is very vain in making large promises of what he will give, when he does not perform; either not having it in his heart, or in the power of his hands, to give what he promises; Satan like, who offered to give all the kingdoms of this world to Christ, if he would worship him, when nothing of it belonged unto him, or was in his power to give: and so the Vulgate Latin version renders it, "a glorious man"; that is, a vainglorious man, and "not fulfilling promises". It may very well be applied to false teachers, who boast of their gifts and spiritual knowledge, when they have none; speaking great swelling words of vanity, when they are empty of all that is good, and are as follow: is like like clouds and wind without rain; which make a show and appearance of rain, promise much, but produce none; see Pe2 2:17, Jde 1:12.