No one can pluck us from the Father’s hand (see John 10:29). This is not the “once saved, always saved” concept that gives assurance to any who merely walk an aisle, raise a hand, or recite a prayer to “ask Jesus into their heart.” It is an assurance that if you are a good-soil hearer, truly repentant and trusting in Christ alone (soundly saved), then God will keep you from stumbling and present you faultless before the presence of His glory, with exceeding joy (see Jude 24).
Isaiah 43:13 Indeed before the day was, I am He;
And there is no one who can deliver out of My hand;
I work, and who will reverse it?”