In this episode laws regarding vows are given. Moses is told to tell the people, if they made a vow, an oath or swore to do something, they were required to do everything that proceeded out of their mouth.

Vows were voluntary but once made the person was obligated to do whatever he or she said.

We note that marriage vows are considered binding. God called the marriage agreement a covenant. A covenant a man and woman made before Him.

However, it came to pass, men started doing a “treacherous” thing. They started divorcing their wives after they lost their youth and beauty. And this stunk in the nostrils of God. So in Malachi chapter 2, He told the men, to start being ruled by "His Spirit” instead of their own carnal spirit, and stop dealing treacherously with their wives.

Jesus addressed the marriage issue in Matthew chapter 19, and after he finished speaking, the disciples said, if that’s the case between a man and his wife it’s best not to get married.

Jesus had told them, the only legitimate reason a man could divorce his wife, was if she had committed fornication. Other than that, if he divorced her, and married someone else he was guilty of committing adultery. They would be breaking one of the ten commandments, they would be in sin in the eyes of God.

Solomon addressed all vow making saying, don’t be rash to utter vows. Don’t make a vow then say it was an error. Why should God destroy the work of your hands.

God addressed young girls who made vows, giving their father, the authority to nullify a vow. A father would know if his daughter had the temperament to keep a vow or not. A husband had the authority to nullify a vow, if he believed it was unwise.

Divorced women and widows also made vows, they like the men, were obligated to keep their vows.

We note that people became Nazarites, out of pure love and devotion for the Living God.
Nazarites wanted to separate themselves from activities, the average person found pleasure in, activities that were not sinful but appeared to bind the person to the cares of this life.

One famous Nazarite was John the Baptist. He didn’t drink wine, he ate locusts and honey, he wore a tunic made of camel’s hair. His life was not focused on obtaining things that pertained to the lives of carnal men.

Thayer’s says carnal means, to be governed by mere human nature not by the Spirit of God.

Those making Nazarite vows wanted to live like pilgrims on earth. They realized the earth was not their final destination.

Jesus warned his followers against being governed by mere human appetite. This he called being "overcharged" by the cares of this life.

Here's the text:

Luke 21:34 And take heed to yourselves, lest at any time your hearts be overcharged with surfeiting, and drunkenness, and cares of this life, and so that day come upon you unawares.

Luke 21:35 For as a snare shall it come on all them that dwell on the face of the whole earth.

Luke 21:36 Watch ye therefore, and pray always, that ye may be accounted worthy to escape all these things that shall come to pass, and to stand before the Son of man.

Jesus did not want his followers to be overcharged that is weighed down with concerns for the things of this world.

If they made the things of this world of great importance, their walk with God would be unfruitful, they would fail to produce the fruits of a righteous life.

Then they would be worthy of being punished with the rest of the world because they bore not the fruits of righteousness.

Their anxious concerns for the things of this world would cause them to walk in disobedience. Jesus warned his followers, in Mark chapter 4 verse 19, that the cares of this world and the deceitfulness of riches and the lusts of other things enter into our lives and choke the word and make it unfruitful.

Our prayer should be as the Psalmist wrote in Psalms 119 verses 35 through 37. There he prayed that God would incline his heart to his word not to covetousness.

God had given David a revelation about righteousness and eternal life. He wanted to live forever, and he knew there was one thing that could cause him to stumble and forfeit eternal life, and that was covetousness. And there was nothing on earth worth exchanging eternal life for.

So he said:

Psalms 119:35 Make me to go in the path of thy commandments; for therein do I delight.

Psalms 119:36 Incline my heart unto thy testimonies, and not to covetousness.

Psalms 119:37 Turn away mine eyes from beholding vanity; and quicken thou me in thy way.

Solomon would tell his readers, it’s man’s duty to fear God and keep his commandments.

So perhaps it was out of such fear, that many chose to be Nazarites, they wanted to separate themselves from things that would cause them to lose the reverential fear of the Living God.

The type of fear that compelled them to keep his commandments and to look forward to receiving the reward of eternal life.

Solomon had wearied himself looking for the meaning and purpose of life. And after all his studying, research and personal experiments, he determined, that man was free to do what he wanted to do with his life. He was free to live anyway he wanted to, but he should always remember that judgment day would come.

So he said:

Ecclesiastes 12:13 Let us hear the conclusion of the whole matter: Fear God, and keep his commandments: for this is the whole duty of man.

Ecclesiastes 12:14 For God shall bring every work into judgment, with every secret thing, whether it be good, or whether it be evil.