"...But exhort one another daily, while it is called "Today," lest any of you be hardened through the deceitfulness of sin." (Heb. 3:13)

"We must stay in constant contact with brethren and encourage one another daily. Sin is the agent that hardens man's heart. Sin is deceitful because it promises us pleasures and happiness, but its rewards are misery and death. If not careful, we can begin to believe the lies of Satan and refuse to hear the voice of God, thus our spiritual arteries become hardened." (From Hebrews by Robert Harkrider, p. 21)

Indeed, sin appears fair, but it is vile. It appears pleasant, but it's destructive. It promises much, but it performs nothing. Let us encourage one another daily lest any be hardened through the deceitfulness of sin.