God chose you for salvation before the foundation of the world. You were saved by God and By God's power and that is why you don't need to worry about losing your salvation. You weren't saved by any good works you did or any good decisions you made. You were saved by the Hand of God who is Mighty to Save.
Ephesians 1:4-9 4According as he hath chosen us in him before the foundation of the world, that we should be holy and without blame before him in love:
5Having predestinated us unto the adoption of children by Jesus Christ to himself, according to the good pleasure of his will,
6To the praise of the glory of his grace, wherein he hath made us accepted in the beloved.
7In whom we have redemption through his blood, the forgiveness of sins, according to the riches of his grace; 8Wherein he hath abounded toward us in all wisdom and prudence;
9Having made known unto us the mystery of his will, according to his good pleasure which he hath purposed in himself:
Romans 9:11 (For the children being not yet born, neither having done any good or evil, that the purpose of God according to election might stand, not of works, but of him that calleth
Romans 9:13-24 13As it is written, Jacob have I loved, but Esau have I hated.
14What shall we say then? Is there unrighteousness with God? God forbid.
15For he saith to Moses, I will have mercy on whom I will have mercy, and I will have compassion on whom I will have compassion.
16So then it is not of him that willeth, nor of him that runneth, but of God that sheweth mercy.
17For the scripture saith unto Pharaoh, Even for this same purpose have I raised thee up, that I might shew my power in thee, and that my name might be declared throughout all the earth.
18Therefore hath he mercy on whom he will have mercy, and whom he will he hardeneth.
19Thou wilt say then unto me, Why doth he yet find fault? For who hath resisted his will?
20Nay but, O man, who art thou that repliest against God? Shall the thing formed say to him that formed it, Why hast thou made me thus?
21Hath not the potter power over the clay, of the same lump to make one vessel unto honour, and another unto dishonour?
22What if God, willing to shew his wrath, and to make his power known, endured with much longsuffering the vessels of wrath fitted to destruction:
23And that he might make known the riches of his glory on the vessels of mercy, which he had afore prepared unto glory, 24Even us, whom he hath called, not of the Jews only, but also of the Gentiles?
There are a bunch more scriptures saying much the same thing but these are pretty much the main ones.
Ephesians 1:4-9 4According as he hath chosen us in him before the foundation of the world, that we should be holy and without blame before him in love:
5Having predestinated us unto the adoption of children by Jesus Christ to himself, according to the good pleasure of his will,
6To the praise of the glory of his grace, wherein he hath made us accepted in the beloved.
7In whom we have redemption through his blood, the forgiveness of sins, according to the riches of his grace; 8Wherein he hath abounded toward us in all wisdom and prudence;
9Having made known unto us the mystery of his will, according to his good pleasure which he hath purposed in himself:
Romans 9:11 (For the children being not yet born, neither having done any good or evil, that the purpose of God according to election might stand, not of works, but of him that calleth
Romans 9:13-24 13As it is written, Jacob have I loved, but Esau have I hated.
14What shall we say then? Is there unrighteousness with God? God forbid.
15For he saith to Moses, I will have mercy on whom I will have mercy, and I will have compassion on whom I will have compassion.
16So then it is not of him that willeth, nor of him that runneth, but of God that sheweth mercy.
17For the scripture saith unto Pharaoh, Even for this same purpose have I raised thee up, that I might shew my power in thee, and that my name might be declared throughout all the earth.
18Therefore hath he mercy on whom he will have mercy, and whom he will he hardeneth.
19Thou wilt say then unto me, Why doth he yet find fault? For who hath resisted his will?
20Nay but, O man, who art thou that repliest against God? Shall the thing formed say to him that formed it, Why hast thou made me thus?
21Hath not the potter power over the clay, of the same lump to make one vessel unto honour, and another unto dishonour?
22What if God, willing to shew his wrath, and to make his power known, endured with much longsuffering the vessels of wrath fitted to destruction:
23And that he might make known the riches of his glory on the vessels of mercy, which he had afore prepared unto glory, 24Even us, whom he hath called, not of the Jews only, but also of the Gentiles?
There are a bunch more scriptures saying much the same thing but these are pretty much the main ones.