Grace is irresistible in Salvation, its the effectual power of God Eph 3:7
: 7 whereof I was made a minister, according to the gift of the grace of God given unto me by the effectual working of his power
Do you believe man can resist the effectual working of Gods Power ?
The power to salvation is in the gospel
John 20:31 (NASB 95) — 31 but these have been written so that you may believe that Jesus is the Christ, the Son of God; and that believing you may have life in His name.
Romans 10:17 (LEB) — 17 Consequently, faith comes by hearing, and hearing through the word about Christ.
2 Timothy 3:15 (LEB) — 15 and that from childhood you have known the holy writings that are able to make you wise for salvation through faith in Christ Jesus.
1 Thessalonians 2:13 (NASB 95) — 13 For this reason we also constantly thank God that when you received the word of God which you heard from us, you accepted it not as the word of men, but for what it really is, the word of God, which also performs its work in you who believe.
Romans 10:6–14 (NASB 95) — 6 But the righteousness based on faith speaks as follows: “DO NOT SAY IN YOUR HEART, ‘WHO WILL ASCEND INTO HEAVEN?’ (that is, to bring Christ down), 7 or ‘WHO WILL DESCEND INTO THE ABYSS?’ (that is, to bring Christ up from the dead).” 8 But what does it say? “THE WORD IS NEAR YOU, IN YOUR MOUTH AND IN YOUR HEART”—that is, the word of faith which we are preaching, 9 that if you confess with your mouth Jesus as Lord, and believe in your heart that God raised Him from the dead, you will be saved; 10 for with the heart a person believes, resulting in righteousness, and with the mouth he confesses, resulting in salvation. 11 For the Scripture says, “WHOEVER BELIEVES IN HIM WILL NOT BE DISAPPOINTED.” 12 For there is no distinction between Jew and Greek; for the same Lord is Lord of all, abounding in riches for all who call on Him; 13 for “WHOEVER WILL CALL ON THE NAME OF THE LORD WILL BE SAVED.” 14 How then will they call on Him in whom they have not believed? How will they believe in Him whom they have not heard? And how will they hear without a preacher?
Romans 1:16 (NASB 95) — 16 For I am not ashamed of the gospel, for it is the power of God for salvation to everyone who believes, to the Jew first and also to the Greek.
1 Timothy 1:14–16 (NASB 95) — 14 and the grace of our Lord was more than abundant, with the faith and love which are found in Christ Jesus. 15 It is a trustworthy statement, deserving full acceptance, that Christ Jesus came into the world to save sinners, among whom I am foremost of all. 16 Yet for this reason I found mercy, so that in me as the foremost, Jesus Christ might demonstrate His perfect patience as an example
for those who would believe in Him for eternal life.
It's the faith of man that God blesses with eternal life
The gift is the indwelling of the Spirit and eternal life for those who believe.