You need to read and believe all of Jesus' words.
As do you.
If one can lose salvation through lack of obedience/good works, then Jesus didn't know what He was talking about.
Jesus said that He gives us eternal life, and that we shall
never perish, and that
no one can snatch us out of His, or the Father's hand. (John 3:16, 10: 28-29)
"No one" includes oneself.
But, according to you, "never" would not actually mean never.
The Bible says that we have been
sealed by the Holy Spirit which is a
pledge guaranteeing our inheritance. (Ephesians 1:13-14, 2 Corinthians 1:22, 5:5)
According to you, that pledge and guarantee isn't worth a lick.
The Bible says we are
sealed for the Day of Redemption. (Ephesians 4:30)
If we can lose salvation, we
haven't been sealed until the day of redemption - only until we personally fail.
Jesus said that He will lose
none of us, but
will raise us up on the last day. (John 6:39)
Looks like Jesus was mistaken when He said "none" of us (Christians) would be lost.
Jesus said that believers will
never come into judgment, and have
passed from death into life. (John 5:24)
To lose salvation would put the former believer back under judgment. So, "never" doesn't mean never according to Jesus again.
The Bible says our calling is
irrevocable. (Roman 11:29)
"Irrevocable" means: "Not able to be changed, reversed, or recovered; final." But I guess Paul (and God) doesn't know that.
The Bible says
nothing in all creation can separate us from the love of God. (Romans 8:38-39)
Are we created? Then not even we can do it.
The Bible says God will
complete the good work that He began in us. (Philippians 1:6)
If we can lose salvation, the "good work" would absolutely
not be completed.
The Bible says we have
been perfected for all time. (Hebrews 10:14)
If we can lose salvation, we have not been perfected for all time, only until we fail.
The Bible says if we drink from the living water that is Christ, we will
never be thirsty again. (John 4:14)
Yet again, I guess Jesus didn't understand the word "never".
The Bible says
God will sustain us to the end, guiltless in the day of the Lord Jesus. (1 Corinthians 1:8)
According to you,
we sustain
ourselves by our continued obedience until the end.
The Bible says that our debt to God has been
canceled through Christ Jesus. (Colossians 2:13-14)
If we lose salvation, the debt returns, even though Jesus paid it in full on the cross. So, "canceled" doesn't actually mean canceled in scripture.
Jesus said that those who are His will
never hunger nor thirst again. (John 6:35)
Oops, there goes Jesus again - not knowing what the word "never" actually means.