Zechariah 10:4-12 v. 12 “I will make my people strong. They will live in safety because of me, announces the Lord.”
Salvation is complete. It is 100% guaranteed. The LORD God promised he would restore and redeem them after they were exiled. He promised them to defeat their enemies and to have compassion on them.
God can, because He is able, save His children. God can, because His heart is true, restore and give grace. To everyone who seeks salvation. He wants our souls to be right with Him. That’s why Christ came.