Peter Pett's Commentary on the Bible - Hebrews 3:15
‘In that it is said, “Today if you will hear his voice, Harden not your hearts, as in the provocation.” The quotation is a repetition of Hebrews 3:7. ‘In that it is said’ perhaps refers back to ‘exhort one another’ (Hebrews 3:13), giving a reason for the exhortation. They are to exhort and encourage one another because the Holy Spirit has said, ‘Today if you will hear His voice, do not harden your hearts, as in the provocation.’ They are to work together to obey Him. Or it may refer back to the... read more
G. Campbell Morgan's Exposition on the Whole Bible - Hebrews 3:1-19
The argument now passed to the second claim of superiority, that over all human leaders. He is first seen as superior to Moses and Joshua. He is "the Apostle" completely fulfilling the function represented by the work of these two; He is also 'High Priest," thus realizing everything suggested in the position of Aaron. The position of Moses was that of a servant in the house of God. His faithfulness was shown in that he made all things according to the pattern. The spiritual house of God... read more