Hebrews 10:30

He that despised Moses’ law died without mercy under two or three witnesses:

Of how much sorer punishment, suppose ye, shall he be thought worthy, who hath trodden under foot the Son of God, and hath counted the blood of the covenant, wherewith he was sanctified, an unholy thing, and hath done despite unto the Spirit of grace?

It is a fearful thing to fall into the hands of the living God.

But call to remembrance the former days, in which, after ye were illuminated, ye endured a great fight of afflictions;