“For I will not dare to speake of any of those things, which Christ hath not wrought by me, to make the Gentiles obedient, by word and deede,”
1611 King James Version (KJV)
15:18 By word - By the power of the Spirit. By deed - Namely, through mighty signs and wonders.
Ro 15:18 I will not dare to speak, etc. The meaning is: "I will not dare to speak of the signs of grace and the work of others, but only of the mighty works of God hath wrought through me to make the Gentiles obedient".