You shall not commit adultery!
First of all you must know and understand that it is by grace you have been saved. It is not because of your good works etc.. But if you count yourself religious and still rely on the law to be forgiven and saved, than yes, you must read them and understand and keep. Every one of them.
Secondly I would like to add that for the word “law” in Hebrew in regard to these 10 commandments correct translation should be “principles.” God gave not only to the Jews but to whole world principles by which if lived, than there can be love, joy, peace and other blessings in person’s life.
Thirdly, any command or principle is with much more greater emphasis from that how we often see and comprehend them. For example it is said: “you shall not murder.” We directly imagine murdering human being. But actually is said also: “if you are angry at your brother or sister…” you are broken this one commandment already. You are murderer in your heart.
Furthermore, it is extremely important to understand that the main reason why the Law was given is, to show people that they are sinful and they are in great need of Redeemer. Galatians 3:19.
Since we have Redeemer already (to everyone who accepts Him and begin to follow His principles), each and every Law, commandment and decree, what ever there may be, are fulfilled by Jesus Christ. He did it for you on the Roman cross. Now, as He through the Holy Spirit begins to work in you, you will be made able to love GOD and love others as yourself.
You will be able to walk with God.
For those who love God and are loved by God, there are no really Law to follow for the entire Law is fulfilled in keeping this one command: "Love your neighbour as yourself" (Galatians 5:14).
The law was given through Moses; grace and truth came through Jesus Christ. John 1:17.
Christ redeemed us from the curse of the law by becoming a curse for us (Galatians 3:13).
If and still there is any doubt in your heart, see all Commandments (just to understand that not even one person has been able to keep them and will be not, for all people are sinful from birth and are in need of Saviour).
In every way seek the Truth, for Christ is the culmination of the Law so that there may be Righteousness for everyone who believes. Romans 10:4.
All who do love are from God and God's Principles for godly living automatically are in his/her heart, for God Himself put them in. All people are saved exclusively by faith alone, by grace alone in/ through Christ alone.
The life and godly walking according the God's advices will be what brings peace, joy and happiness. Not the concentration on the so called 10 commandments.
People who are free from the Law are enabled to live, and serve God from the bottoms of their hearts; they are able to love and do more than those who follow and try to live according to the Law.
Anyway, here is the good, holy and perfect Law:
This Commandment, as the rest of all, is about honour, respect and love. If love is maintained in our hearts and minds than we honour other person by not committing adultery. Adultery is the violation of the marriage covenant when one of partners wilfully participate in sexual activity with someone else outside the home/ marriage. Husband and wife are made to be together in close relationship, and meet each others needs (which are different) according not what this world's devastating teachings are, but according to the Word of God. God created marriage and design sex for humans to enjoy life to the full and said - "That is why a man leaves his father and mother and is united to his wife, and they become one flesh." (Genesis 2:24).
"Male and female are created in unique way and "marriage should be honoured by all, and the marriage bed kept pure, for God will judge the adulterer and all the sexually immoral." (Hebrews 13:4).
Paul teaches that "because there is so much sexual immorality, each man should have his own wife, and each woman should have her own husband." (1 Corinthians 7:2). Those who forbid man to marry violate and break God's Commandments at all points. (1 Timothy 4:3).
It is difficult for many in this polluted and corrupted world to live for their full enjoyment just because people are led astray and do not know golden rules (God's instructions) for happy marriage. Temptations will always come but we can control our sensual desires by replacing them with concern for others by loving them in the way God teaches.
God's intent for male and female was to enjoy them stable sexual relationships and marriage. His intent was may they enjoy each other in abundant pleasures all the days of their life and only applying His wisdom in marital relationship it can be made possible.
God created sex and it was His idea for people to enjoy it.
Go to His Word, apply His instructions and enjoy life to the full. Nothing in this world comes for free. Right? Also happy marriage and stable sexual relationship requires investment of willingness, time and even some sacrifices. But I guarantee you that at the end you will be blessed and will praise God if you will follow His Commandments.
God often speaks about spiritual adultery which is unfaithfulness to God.
"You adulterous people, don't you know that friendship with the world means enmity against God? Therefore, anyone who chooses to be a friend to the world becomes an enemy of God. Or do you think Scripture says without reason that He jealously longs for the spirit He has caused to dwell in us?" (James 4:4-5).
It is crucial to understand that all world is under the power of Satan. He rules as the prince of this earth. (John 14:30; John 12:31). God will never tolerate if we choose to worship god of this age (2 Corinthians 4:4). He always will see us as an adulterous people until we turn our attention exclusively on Him.
To those who worship anything else but Him God says - "You adulterous wife! You prefer strangers to your own husband! (Ezekiel 16:32).
Each and every Word of God is true and applies to all of us.
This Commandment and all the others is given to us to save us from our sins and its consequences, and teaches us to love the LORD your God and love your neighbour as yourself. All God's instructions are given may humans enjoy their life to full.
And as you know that there is neither Jew nor Gentile, neither slave nor free, nor is there male and female, for you are all one in Christ Jesus, take to heart that your Maker is your Husband-- the LORD Almighty is His name - the Holy One of Israel is your Redeemer; He is called the God of all the earth. Galatians 3:28; Isaiah 54:5.
Serve Him alone and His blessings will be on your food and water. (Matthew 6:24). God must be first in all things and that is the only requirement, if obeyed, shows and helps how to avoid adultery both, physical and spiritual. Seek always His direction, wisdom and blessing
"Drink water from your own cistern, running water from your own well. Should your springs overflow in the streets, your streams of water in the public squares?
Let them be yours alone, never to be shared with strangers. May your fountain be blessed, and may you rejoice in the wife of your youth.
A loving doe, a graceful deer-- may her breasts satisfy you always, may you ever be intoxicated with her love.
Why, my son, be intoxicated with another man's wife? Why embrace the bosom of a wayward woman? For your ways are in full view of the LORD, and He examines all your paths."
(Proverbs 5:15- 21).