“And all drank the same spiritual drink, for they were drinking from a spiritual rock which followed them; and the rock was Christ” (1 Corinthians 10:4).
If you have tasted of Christ’s own manna, why would you seek the bread of the world that can never satisfy nor bring a sweet savour to the mouth?
If you have ever drunk from the spiritual Rock that is Christ Jesus, why would you ever go back to drink from the muddy waters of the Nile? They may taste sweet to those who belong to Egypt but will prove to be bitter in the mouth of the believer.
When the fountain of living water flows so freely why would we hew for ourselves cisterns that hold no water?
The answer is that the soul of man has an aspect that is able to be satisfied by religion. Being in the soul, it can be controlled by man, while allowing us to think that it is God-centred. This is the work of Satan, that enemy of God and man, whose corruption of the flesh of man means that he is its master.
Thus we are deceived into sin, the sin of drawing away from the Living God, and thence into unbelief, without knowing it, as the soulish religious nature of our flesh takes over. It all takes place subtly and gradually so that we don’t realise that it’s happening. But we will know it eventually, because if you harden your heart, you will not hear God’s voice (Hebrews 4:7).