The most powerful weapon to conquer the devil is humility. For, as he does not know at all how to employ it, neither does he know how to defend himself from it.
Humility is nothing but truth, and pride is nothing but lying.
Practice humility and patience.
We must be firm but not rough in our guidance and avoid an insipid kind of meekness, which is ineffective. We will learn from Our Lord how our meekness should always be accompanied by humility and grace so as to attract hearts to Him and not cause anyone to turn away from Him.
Scorn both these evil suggestions and the wickedness of their author, who is the devil. Be very cheerful and humble yourself as much as you can. Ordinarily, God allows these things to happen to free us from some hidden pride and to engender in us holy humility.