Ep.08 - Do not harden your heart

Heb 3:12  Take heed, brethren, lest there be in any of you an evil heart of unbelief, in departing from the living God. 
Heb 3:13  But exhort one another daily, while it is called To day; lest any of you be hardened through the deceitfulness of sin. 
Heb 3:14  For we are made partakers of Christ, if we hold the beginning of our confidence stedfast unto the end; 
Heb 3:15  While it is said, To day if ye will hear his voice, harden not your hearts, as in the provocation.