“I am the vine, you are the branches. Whoever remains in me, with me in him, bears fruit in plenty; for cut off from me you can do nothing. Anyone who who does not remain is thrown away like a branch—and withers; these branches are collected and thrown on the fire and are burnt”—John 15:5,6 NJB
Using figurative speech, Jesus made very clear that Christians must remain in Jesus, and not leave him. Just to be clear, a Christian could leave and return, like the prodigal son (Luke 15:11-32). But what if a Christian leaves Jesus at some point and does not return to him? Then what? Does that mean that he “was never saved in the first place”, as “eternal security” believers claim? Is “Once Saved, Always Saved” (OSAS) a Biblical teaching?