The Grace Reading
This verse is usually quoted with a period dropped in after the first clause. Without faith it is impossible to please Him. Full stop, ominous pause, everyone in the room does a quick inventory of their believing and comes up short. But the sentence does not end there, and the half that gets left out is the half that defines the terms.
Read the rest of it. “he who comes to God must believe that He is, and that He is a rewarder of those who diligently seek Him”. That is the definition, supplied inside the verse. Faith here is not a substance you accumulate until the gauge reads full. It is two convictions about Someone else: that He is really there, and that He is generous toward people who come looking. Nothing in that sentence measures the intensity of your believing. Every bit of it describes the character of the One believed.
Which explains why faith is the thing that pleases Him. God's standard is not high; it is perfect. Anyone approaching with something in hand is approaching with a payment that will not clear. Faith pleases God precisely because it comes empty-handed, expecting goodness it did not earn. It is the one posture that lets the finished work of Christ be the whole basis of the visit. Under Moses you brought your record. In Christ you bring His, which is why the writer of Hebrews spends eleven chapters getting people to stop bringing anything else.
And look at the word the verse chooses for God: rewarder. Not inspector, not auditor, not a Father waiting to see whether your faith reached the required voltage. He rewards those who diligently seek Him, and diligent seeking describes the person who keeps coming back. That is the man who said “Lord, I believe; help my unbelief!” (Mark 9:24) and got exactly what he asked for, doubt and all. Coming while unsure of yourself is still coming.
So this verse can never be aimed at a believer as a threat. It was never asking whether your faith is strong enough to satisfy God. It was telling you where to look, and then telling you what you will find when you get there. You are not being graded on your believing. You are being invited to expect a generous God, and the reason you can expect it is that Christ already settled the account before you ever worked up the nerve to approach.
The Common Misreading
Turned into a performance meter, this verse becomes the most efficient shame device in the New Testament. Prayer unanswered, so your faith must have been weak. A hard diagnosis, so somebody did not believe hard enough. A bad week and a wandering mind, so today you have not pleased God. Read that way it produces Christians who are anxious about their anxiety, monitoring their own confidence to see whether it is holding, which is the fastest way to lose it.
The verse itself will not carry that freight. It says nothing about the quantity of your faith and everything about the object of it. God is not disappointed in the size of your trust. He is the One who is there, and He is a rewarder, and the record He is pleased with belongs to His Son and has already been credited to you.