Many things changed after the American Revolution. New freedoms were enjoyed, and citizens had to become accustomed to a republic instead of the monarchy they had all lived under in the past. It wasn’t that there had been a change in kings. It was a totally different type of government now. The same is true of what has happened now that the Mosaic Law is fulfilled in Christ. We have been set free form a law that could only condemn, but could not redeem. We moved from a law that was laid out line by line and specified everything that could and could not be done.

One thing that is different is that now, instead of having to commit a sinful act, we only have to want to do it in our hearts in order to be guilty before God. So it is not that this new law is easier. It is just different because it gets to the root of sin — our hearts.
The Hebrew writer refers to it when he quotes Jeremiah 31:33-34:

And the Holy Spirit also bears witness to us; for after saying,
“This is the covenant that I will make with them after those days, declares the Lord: I will put my laws on their hearts, and write them on their minds,”
then he adds,
“I will remember their sins and their lawless deeds no more.”
Where there is forgiveness of these, there is no longer any offering for sin. (Hebrews 10:15-18 ESV)

Before, the law had to spell everything out compel obedience. Now, the Spirit has put the New Law in our hearts. Whenever we take in the words of Scripture, especially if we commit them to memory, we are busy putting those laws in our hearts. As a result, our minds and hearts are transformed.

According to Jesus, the Mosaic Law was in force until John the Baptist. Now we are under Kingdom Law.

“The law and the prophets were in force until John; since then, the good news of the kingdom of God has been proclaimed, and everyone is urged to enter it. (Luke 16:16 NET)

Now, instead of being ruled by the letter of the law, we must keep the spirit of the law. The Apostle Paul put it this way to the Corinthians:

Not that we are adequate in ourselves to consider anything as if it were coming from ourselves, but our adequacy is from God, who made us adequate to be servants of a new covenant not based on the letter but on the Spirit, for the letter kills, but the Spirit gives life. (2 Corinthians 3:5, 6 NET)

Here is a good place to define the terms “doctrine” and “practice”. All doctrine must be founded in the Word of God. We are not to go beyond what God has revealed, but must be able to back up what we teach to be truth with chapter and verse.
But practices are different. They are the things we do to live out the truth in our lives. Practices must be done with doctrine in mind. For instance, if a practice violates doctrine, it is sin. But if a practice can be done without violating what has been revealed, and does not violate our conscience, the we are free do do it, keeping in mind that we are not to violate the spirit of the law either.

Here is an example. The Bible clearly says that the Lords Supper was eaten using unleavened bread and the fruit of the vine. To use anything else wild violate what the Bible says those elements symbolize. So using cookies and Pepsi would violate the spirit of the law and would be sinful. In the other hand, we make partake of those same elements indoors, outdoors, left handed, right handed, with red grape juice, purple grape juice, in one cup or many cups because none of those things violate the intent of the commandment. We do not need to wring our hands because we have no clear direction on those kinds of exact details. Neither to we have to find an example for everything we do. If it is not contrary to doctrine, and is not unwise (it’s not stupid), won’t create the appearance of evil, and will not cause a brother or sister to stumble, then go ahead.

Another example is in giving. What is important is that we give, not whether or not we use a check or cash. Either one is fine because they didn’t have checks 2000 years ago, so no direction is given about the exact type of funds to be given. We just give as we have determined in our hearts, and do so cheerfully because that’s what the Word says to do. Instead of looking at the exact amount we give, as was done with the tithe under the Old Law, God looks upon our hearts and the motive behind our giving. In a way, it’s easier and harder at the same time.

I have seen the pendulum swing both ways. A group of Christians starts off wanting to follow Jesus by the New Testament alone. And things go well for awhile, until some will start wanting a chapter and verse for every single thing that is done, when sometimes there is none. They end up missing the forest for the trees as they sink into focusing on the minutia and lose there first love. Take it to it’s conclusion, and you won’t have a church building, since none are authorized in the New Testament and none existed for the first 300 years of church history.
But then the opposite happens. A group splits off and declares that they are fee of such legalism and cat aside all restraint. Not only do they stop searching the Scriptures to find it what to do, they stop paying attention to the scriptures for what to believe as well. And as the baby swirls down the drain with the bath water, the sink into lawlessness and are worse off than when they began.

The key is in finding balance. We teach doctrine from the Word and only the Word, and are only open to practices that do not violate doctrine. That will end needless debate on things of little importance so we can focus on teaching the truth of God’s Word in its purity and simplicity. We will not be arguing over the arranging of the deck chairs on the Titanic, but will be focused on getting people to the lifeboats before they are forever lost.