[Moses] is faithful in all my household.
I speak with him directly,
openly, and not in riddles;
he sees the form of the Lord.So why were you not afraid to speak against my servant Moses? (Numbers 12:7-8)
Needless to say, God was pretty upset with Aaron and Miriam for their attitude toward Moses.
But the writer of Hebrews makes a very interesting application.
Moses was faithful as a servant in all God’s household, as a testimony to what would be said in the future. But Christ was faithful as a Son over his household…
Therefore, as the Holy Spirit says:
“Today, if you hear his (i.e. Jesus’) voice,
do not harden your hearts as in the rebellion…” (Hebrews 3:5-8)
As much as the Israelites were to heed Moses’ voice, we are to heed Jesus’.
Moses was merely a faithful servant, and the people had to heed him.
But Jesus is the faithful Son. More, he is our apostle and high priest. (Hebrews 3:1)
So let us not harden our hearts to him, but always keep hearts that are soft and obedient to him.
Moment to Moment (Bible blog) 