Charles Spurgeon Commentary Hebrews 3:13

"but exhort one another day by day, so long as it is called To-day; lest any one of you be hardened by the deceitfulness of sin:" — Hebrews 3:13 (ASV)

But exhort one another daily.

In opposition to their always erring, always be exhorting. And you cannot do this with integrity unless you are always watching that you yourselves do not err. But when, walking closely with God, you exhort one another, it is good.

Exhort one another daily.

But exhort one another daily, while it is called Today; lest any of you be hardened through the deceitfulness of sin.

If sin came to you openly proclaiming itself as sin, you would fight against it; but it is very cunning and deceitful, and it gradually petrifies the heart and especially the heart of those who think that they will never provoke God by their sin. Pride has already begun to work in them; and where pride can work, every other sin finds elbow-room. God save us from the deceitfulness of sin!

While it is called Today; lest any of you be hardened through the deceitfulness of sin.

If sin were to come to us labeled as sin, I trust we should reject it; but there is a deceitfulness of sin. It sometimes comes as a necessary action. We think that wisdom demands that we should sin a little sometimes to avoid some great evil; and in this way, the soul becomes hardened through the deceitfulness of sin. Oh! If the devil were to come in the shape of a devil, he would do little mischief. But he assumes the appearance of an angel of light, and it is in this way that he causes us so much sin and sorrow.