More (Greek - meizon): denotes greater in amount; additional.
Sure (Greek - bebaios): safe, steadfast; firm
The word of prophecy "made sure" II Peter 1:19, is not a comparison between the old covenant prophesies, but the old has been confirmed in the person of Yeshuah, the Messiah (Hebrews ch. 1; 7:13; 7:22; 10:9)
Word In John 17:17, Jesus said, "My Word is Truth." (Read) Matthew 17th Chapter; Isaiah 42:1-10
John 6:63 Jesus said, "The words that I speak unto you they are spirit and they are life."
Yahshua (Jesus) was transfigured (metemorpho) the "changed form" before his Inner Circle Disciples. This was a revelation of Yahshua's glory. His face and his garment became white as the light. The Lord set up this dramatic scene with the clouds and lights for this great announcement. A voice from the Bright Cloud that enveloped them said, "This is my Beloved Son, whom I love; with Him I am well-pleased. Listen to (Hear) him, hear ye him" Matt 17:5; Is. 42:1; II Pet. 1:17
Yahshua just talked with them, in His earthly ministry. He loved them and was with them. We have a better covenant established upon better promises (Heb. 8:6). Yahshua loves us, and He is with us -- the Believer. (I John 4:4; and I Cor. 6:19). Hebrews 1:1-2 declares, "Yahveh (God) who at sundry times and in divers manners spake in time past unto the Fathers by the prophets, hath in these last days spoken unto us by his Son..." (Act 3:22) " Him shall you hear..."