17 “If a person sins, and commits any of these things which are forbidden to be done by the commandments of the LORD, though he does not know it, yet he is guilty and shall bear his iniquity. (Leviticus 5:17)
Ignorance of the law is no defence. There are about 613 specific Laws in the Bible. We can know these Laws, and as understood in the New Testament context, they can be obeyed with the help of the Holy Spirit within us. On the other hand, the Pharisaical laws of the modern State are so numerous, that it is impossible for any one person to know a portion of them, let alone for any one to obey all of them.
Australian Tax Law alone requires specialists in each of the eight spheres of taxation: superannuation, corporate, goods and services, inheritance, excise, property, payroll, income. In many cases, these laws contradict each other and it is impossible to remain obedient to all the applicable laws at the same time. Not even politicians, who are responsible for passing these laws, know what they are voting for when they vote. The volumes of regulations that follow the Act are too great for the politicians to be able to read. This is Pharisee ism writ large.
Despite the plethora of Humanistic laws, rules, regulations and charters, God's Law is the ultimate Law that all of us shall be measured against in the Final Judgment. Our only defense will be our relationship to the Lord Jesus Christ. All who confess and repent of their known and unknown sins, and who put their trust in the Atonement of the Lord Jesus Christ shall be declared, "Not guilty!" of their offences against God. On the other hand, no one shall be able to say, "But I did not know," when they stand before the bar of the Eternal Judge. His Law is knowable, and has been revealed in the things that He has Created, such that all are without excuse.
Oh how I love Thy Law; it is my meditation all the day! Lord, cause me to be a keeper of Your Law; fill me with Your Holy Spirit, Who was given taht He may cause me to walk in Your Law that is written upon my heart.