What good will it be for someone to gain the whole world, yet forfeit their soul? Or what can anyone give in exchange for their soul?

Is to deny one self simply to forgo opportunities that we may have or may not have pursued? Or does it mean we deny sins we typically label as “bigger”, but the smaller ones are acceptable? Perhaps it’s to deny myself that meal or that trip or that purchase I’ve been wanting so badly. Maybe some or none of the above? It’s a good thing God doesn’t leave it up to us to define self-denial. The Lord plaining teaches on the subject and as to what it really means.