JMNT(i)
6 and yet then falling by the side (or: falling aside along the way), [are] powerless and unable to be repeatedly renewing again into a change of mind: [they are] continuously crucifying again in themselves (or: to, for or by themselves) the Son of God, and [are] constantly exposing [Him] to public disgrace.
7 For you see, a piece of land (or: ground; soil; = a field; or: a territory) which is drinking (= soaking in) the rain often coming upon it, and producing vegetation (pasture; produce) fit for and useful to them through whom it is habitually being cultivated, [is] also continuously sharing in and partaking of a blessing from God;
8 but when repeatedly and progressively bearing forth thorns and thistles [it is] disqualified (worthless; unable to stand the test [for planting a new crop]) and [is] close to (or: near) [the] curse (or: a down-prayer and a corresponding wish against [the situation] is at hand), the end (the resultant situation) of which [the thorn, briars, thistles and the field is] into [a time of] burning (or: = the field ends up being burned off). [comment: this is a time-honored agricultural practice for preparing a field for planting a crop – the competition has been removed and the ground has been enriched by the ash]