This is why it's necessary for us to pay more attention to what we have heard, or else we may drift away from it.
References for Hebrews 2:1
If the message that was spoken by angels was reliable, and every offense and act of disobedience received an appropriate consequence,
how will we escape if we ignore such a great salvation? It was first announced through the Lord, and then it was confirmed by those who heard him.
God also vouched for their message with signs, amazing things, various miracles, and gifts from the Holy Spirit, which were handed out the way he wanted.