How do proponents of “once saved, always saved” interpret passages that condition salvation on perseverance?

In Matthew 24:13, Jesus says: >“But the one who endures to the end will be saved.” This appears to place a condition on salvation—namely, perseverance. It seems to imply that failing to endure could result in not being saved. Additionally, in Galatians 3:3, Paul rebukes believers: >“Are you so foolish? Having begun by the Spirit, are you now being perfected by the flesh?” This raises concerns about those who begin in faith but do not continue rightly. Other passages such as Hebrews 3:14 (“we have come to share in Christ, if indeed we hold our original confidence firm to the end”) also seem to connect salvation with continued faithfulness. **Question:** How do proponents of the doctrine that salvation cannot be lost (e.g., “once saved, always saved”) reconcile these passages with their view? Specifically, how are conditional statements about enduring to the end understood within that framework?