I don't believe that the believer's security in Christ is conditional. I believe in unconditional eternal security (and as a result, in its corollary OSAS).
Next?
It's not my "first rodeo" either. All of the verses quoted support the doctrine of eternal security.
You want me to? OK.
"Since you have been born again,
not of perishable seed but of imperishable, through the living and abiding word of God."
1 Peter 1:23
- Now that we've been born again, we cannot fall from grace or perish.
"All that the Father gives me will come to me, and whoever comes to me I will never cast out."
John 6:37
- Christ will never cast out those who come to Him, bound through the Father's will since the beginning of time (Ephesians 1:3-14). Those who come genuinely will never lose their faith or salvation.
"My sheep hear my voice, and I know them, and they follow me. I give them eternal life, and they will never perish, and no one will snatch them out of my hand. My Father, who has given them to me, is greater than all, and no one is able to snatch them out of the Father's hand."
John 10:27-29
- Not even we can free ourselves from Christ once sanctified and redeemed by His holy blood.
"Who shall separate us from the love of Christ? Shall tribulation, or distress, or persecution, or famine, or nakedness, or danger, or sword?"
Romans 8:35
- Surely we ourselves cannot separate ourselves from the love of Christ once saved. Why?
"For the gifts and the calling of God are irrevocable."
Romans 11:29
"If we are faithless, he remains faithful - for he cannot deny himself."
2 Timothy 2:13