I believe in the perseverance of the saints meaning that everyone who is redeemed by Jesus Christ will endure faithfully to the end and those of whom have fallen asleep will be raised.
Clarification: This is not to say that everyone who makes a ‘profession of faith’ in Jesus Christ will endure to the end, but only those who are elect in Christ, that is, those who possess saving faith which is manifested by the fruit of faithfulness, by grace alone (Eph 4:17-32; Col 3:1-17; 1 John 2:19).
The perseverance of the saints is the conclusive act of God in the Christian doctrine of salvation. Salvation is the work of the triune God to bring sinful humans into saving fellowship. The perseverance of the saints highlights the Spirit’s activity in perfecting the salvation of the individual as it is the Father who elects, the Son who reconciles, and the Spirit who perfects (Eph 1:11-14).
The perseverance of the saints underlines the role of God in his faithfulness to completely redeem the elect (Phil 1:6). God’s faithfulness is repeatedly highlighted in the Psalter. The hesed of the LORD is translated as “steadfast love” or “covenant faithfulness” Ps 5:7; 6:4; 13:5; 17:7; 18:50; 21:7; 25:6-7, 10; 26:3; 31:7, 16, 21; 32:10; 33:5, 18, 22; 36:5, 7, 10; 40:10-11; 42:8; 44:26; 48:9; 51:1; 52:1, 8; 57:3, 10; 59:10, 16-17; 61:7; 62:12; 63:3; 66:20; 69:13, 16; 77:8; 85:7, 10; 86:5, 13, 15; 88:11; 89:1-2, 14, 24, 28, 33, 49; 90:14; 92:2; 94:18; 98:3; 100:5; 101:1; 103:4, 8, 11, 17; 106:1, 7, 45; 107:1, 8, 15, 21, 31, 43; 108:4; 109:21, 26; 115:1; 117:2-118:4; 118:29; 119:41, 64, 76, 88, 124, 149, 159; 130:7; 136:1-26; 138:2, 8; 143:8, 12; 144:2; 145:8; 147:11).
This reality of God’s faithfulness assures the believer of his salvation. This assurance is not rooted in the believer’s ability to remain faithful in himself, but is utterly dependent upon Christ’s continual intercession and the testimony of the Holy Spirit (Lk 22:32; Rom 8:15-17). On God rests our salvation and our glory; our mighty rock, our refuge is God (Psalms 62:7 ). Salvation is the work of God from unconditional election to the consummation of the kingdom and the recreation of the cosmos and this work absolutely cannot be thwarted (1 Cor 1:8-9; Jn. 6:37-40; 10:27-28; 17:12; 18:9; 2 Tim 4:7; 1 Pet 1:5; Jude 24-25; Rom 8:31-39).