Because we belong to God through Christ Jesus purchase of us with His blood, love and honor God, live for and serve Him, as well as proclaim His gospel and words to people around us. We are like Moses was to Him; His oracle to others who don’t here from God directly. And if that’s who we are, God will challenge and/or bring quick judgment to those who speak against us or hurt us. See what happens to Miriam after she and Aaron spoke ill of Moses.
Numbers 12:5-10
5 Then the Lord came down in a pillar of cloud; he stood at the entrance to the tent and summoned Aaron and Miriam. When the two of them stepped forward,
6 he said, “Listen to my words:
“When there is a prophet among you, I, the Lord, reveal myself to them in visions, I speak to them in dreams.
7 But this is not true of my servant Moses; he is faithful in all my house.
8 With him I speak face to face,
clearly and not in riddles;
he sees the form of the Lord.
Why then were you not afraid
to speak against my servant Moses?”
9 The anger of the Lord burned against them, and he left them.
10 When the cloud lifted from above the tent, Miriam’s skin was leprous—it became as white as snow.
Isaiah 54:17
But in that coming day no weapon turned against you will succeed. You will silence every voice raised up to accuse you. These benefits are enjoyed by the servants of the LORD; their vindication will come from me. I, the LORD, have spoken!