Hebrews 6:1
1Therefore leaving the teaching of the first principles of Christ, let’s press on to perfection—not laying again a foundation of repentance from dead works, of faith toward God,
“Therefore” picks up the rebuke of milk-drinkers: leave the elementary doctrine let’s press on to perfection. Wesley: saying no more of these for the present—not forgetting them, but refusing to stall forever on first things. Repentance from dead works and faith toward God remain the foundation; the call is to build.
Growth is grace-enabled and sincerely required. Believers who linger in rudiments risk the dullness already named. Maturity is not optional polish; it is the path along which steadfastness is kept—or lost.
Calvin: leave first principles not by forgetting them, but by refusing to remain always engaged in laying the foundation. The house must rise. Elementary doctrine is for catechumens; the goal is progress God Himself permits and produces.
Going on to maturity grows from a living faith God has planted. The foundation stands; the elect are pressed forward by the same grace that began them. Stagnation is dangerous precisely because warnings are means in the path of perseverance.