Paul explains to the Hebrews that the Old Covenant has “…waxeth old [and] is ready to vanish away.” (Hebrews 8:13) Paul urges the Hebrews and everyone who can read this letter (either then, or today) should; “…teach every man his neighbour, and every man his brother, saying, Know the Lord: for all shall know me, from the least to the greatest. For I will be merciful to their unrighteousness, and their sins and their iniquities will I remember no more.” (Hebrews 8:11-12)
Essentially Paul has reminded us that God is merciful. This means that is DOES NOT matter if we have sinned in the past, as long as we put it in the past. Those who come to Christ, will have their sins and wickedness be forgotten by Him.