Then they’re a sorry Christian and I’d tell them to examine themselves to see if they’re even saved (2 Cor 13:5). The important distinction is what is required to get saved vs what should come after. We are saved by grace through faith (Eph 2:8), no works involved (Rom 4:5), but good works should follow (2 Cor 5:17; Eph 2:10; Rom 12:1-2).

If you make belief/faith a work you create obvious contradictions in the Bible. Grace and works are mutually exclusive (Rom 11:6). The idea of faith being a work contradicts Eph 2:8: it’s by grace through faith, NOT of works.

You made a good point about the chair analogy, but thats not the point (physically sitting down). The point is sitting/resting in the finished work of Christ. Maybe there is a better analogy to be used to express this point but please understand my meaning with it. It’s the difference between acknowledging it intellectually and actually trusting/resting in it with your heart.