as You have given Him authority over all flesh, that He should give eternal life to as many as You have given Him. And this is eternal life, that they may know You, the only true God, and Jesus Christ whom You have sent. John 17:2-3
How does John 17:2 somehow nullify John 3:16, and Luke 8:12 and Romans 10:9?
For God so loved the world that He gave His only begotten Son, that whoever believes in Him should not perish but have everlasting life. John 3:16
Those by the wayside are the ones who hear; then the devil comes and takes away the word out of their hearts, lest they should believe and be saved. Luke 8:12
that if you confess with your mouth the Lord Jesus and believe in your heart that God has raised Him from the dead, you will be saved. Romans 10:9
Neither Jn 17:2 or the Bread of Life Discourse in Jn 6 nullify any of those scriptures. Those passages complement them. After all, God graciously supplies the necessary faith per the various cites given earlier.