Titus 1 9

AMP Titus 1:9He must hold fast to the sure and trustworthy Word of God as he was taught it, so that he may be able both to give stimulating instruction and encouragement in sound (wholesome) doctrine and to refute and convict those who contradict and oppose it [showing the wayward their error].

AMP Titus 1:9He must hold firmly to the trustworthy word [of God] as it was taught to him, so that he will be able both to give accurate instruction in sound [reliable, error-free] doctrine and to refute those who contradict [it by explaining their error].

KJV Titus 1:9holding fast the faithful word as he hath been taught, that he may be able by sound doctrine both to exhort and to convince the gainsayers.