Those whom God has accepted in the Beloved and sanctified by His Spirit will never totally nor finally fall away from the state of grace, but shall certainly persevere to the end; and though they may fall through neglect and temptation into sin, whereby they grieve the Spirit, impair their graces and comforts, bring reproach on the Church and temporal judgments on themselves, yet they shall be renewed again unto repentance and be kept by the power of God through faith unto salvation.
(Ephesians 1:13-14) In Him, you also, after listening to the message of truth, the gospel of your salvation—having also believed, you were sealed in Him with the Holy Spirit of promise, 14 who is given as a pledge of our inheritance, with a view to the redemption of God’s own possession, to the praise of His glory.
(John 10:27-30) My sheep hear My voice, and I know them, and they follow Me; 28 and I give eternal life to them, and they will never perish; and no one will snatch them out of My hand. 29 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. 30 I and the Father are one.”
(John 6:37-47) All that the Father gives Me will come to Me, and the one who comes to Me I will certainly not cast out. 38 For I have come down from heaven, not to do My own will, but the will of Him who sent Me. 39 This is the will of Him who sent Me, that of all that He has given Me I lose nothing, but raise it up on the last day. 40 For this is the will of My Father, that everyone who beholds the Son and believes in Him will have eternal life, and I Myself will raise him up on the last day.” 41 Therefore the Jews were grumbling about Him, because He said, “I am the bread that came down out of heaven.” 42 They were saying, “Is not this Jesus, the son of Joseph, whose father and mother we know? How does He now say, ‘I have come down out of heaven’?” 43 Jesus answered and said to them, “Do not grumble among yourselves. 44 No one can come to Me unless the Father who sent Me draws him; and I will raise him up on the last day. 45 It is written in the prophets, ‘And they shall all be taught of God.’ Everyone who has heard and learned from the Father, comes to Me. 46 Not that anyone has seen the Father, except the One who is from God; He has seen the Father. 47 Truly, truly, I say to you, he who believes has eternal life.
(John 5:24) “Truly, truly, I say to you, he who hears My word, and believes Him who sent Me, has eternal life, and does not come into judgment, but has passed out of death into life.
(Romans 8:35-39) Who will separate us from the love of Christ? Will tribulation, or distress, or persecution, or famine, or nakedness, or peril, or sword? 36 Just as it is written, “For Your sake we are being put to death all day long; We were considered as sheep to be slaughtered.” 37 But in all these things we overwhelmingly conquer through Him who loved us. 38 For I am convinced that neither death, nor life, nor angels, nor principalities, nor things present, nor things to come, nor powers, 39 nor height, nor depth, nor any other created thing, will be able to separate us from the love of God, which is in Christ Jesus our Lord.