Only a natural man of the flesh would even ask that question.
Nope.
Baby believers too! And carnal believers.
I disagree.
"Baby believers" are freshly delivered from the world....they have the simple faith of a child. Their thought is NOT how much sin they can get away with, but are rejoicing in how much sin has been forgiven them.
"Carnal believers" are still under the law...thus not believers at all. They aren't dead to sin, therefore they are still striving to enter into the rest by their own efforts.
Those are nice observations. However the scriptures indicate clearly otherwise. For example Peter says to desire the milk of the word...
Men don't desire because God's grace is irresistable?
They resist God's grace every day (Jn 3:19). After enough of that God withdraws from them (Ge 6:3, Ro 1:28-32). They will not believe the truth or yield to God's law so they will rightfully and poetically believe a lie (2 Thess 2:9-12).
Men have the seed of sin in them (Ps 51:5). They must be born again (1 Pe 1:23). Sometimes it takes time for the sinner's sin to come to full fruition (Jas 1:15) but it comes out (1 Co 6:9-11).
They went out from us, but they were not of us; for if they had been of us, they would have continued with us; but they went out that they might be made manifest, that none of them were of us (1 Jn 2:19).
For it is impossible for those who were once enlightened, and have tasted the heavenly gift, and have become partakers of the Holy Spirit, and have tasted the good word of God and the powers of the age to come, if they fall away, to renew them again to repentance, since they crucify again for themselves the Son of God, and put Him to an open shame (Heb 6:4–6).
For if we sin willfully after we have received the knowledge of the truth, there no longer remains a sacrifice for sins, but a certain fearful expectation of judgment, and fiery indignation which will devour the adversaries. Anyone who has rejected Moses’ law dies without mercy on the testimony of two or three witnesses. Of how much worse punishment, do you suppose, will he be thought worthy who has trampled the Son of God underfoot (Heb 10:28-29).
See:
The Potter and the Clay J Vernon McGee