well to answer your question, you use the bible to define the bible. why did God command Abraham, lets look at what the bible says about this.
Romans 4:2
For if Abraham were justified by works, he hath whereof to glory; but not before God.
Romans 4:3
For what saith the scripture? **Abraham believed **God, and it was counted unto him for righteousness.
Romans 4:9
Cometh this blessedness then upon the circumcision only, or upon the uncircumcision also? for we say that **faith was reckoned to Abraham **for righteousness.
Romans 4:13
For the promise, that he should be the heir of the world, was not to Abraham, or to his seed, through the law, but through the righteousness of faith.
Romans 4:16
Therefore it is of faith, that it might be by grace; to the end the promise might be sure to all the seed; not to that only which is of the law, but to that also which is of the faith of Abraham; who is the father of us all,
Galatians 3:6
Even as Abraham believed God, and it was accounted to him for righteousness.
Galatians 3:7
Know ye therefore that they which are of faith, the same are the children of Abraham.
Galatians 3:9
So then they which be of faith are blessed with faithful Abraham.
Hebrews 11:8
By faith Abraham, when he was called to go out into a place which he should after receive for an inheritance, obeyed; and he went out, not knowing whither he went.
Hebrews 11:17
By faith Abraham, when he was tried, offered up Isaac: and he that had received the promises offered up his only begotten son,
James 2:21
Was not Abraham our father justified by works, when he had offered Isaac his son upon the altar?
James 2:23
And the scripture was fulfilled which saith, Abraham believed God, and it was imputed unto him for righteousness: and he was called the Friend of God.
So we see from the bible a couple of key words
Faith
belief
works
righteosness
lets see what these all mean
Faith and belief is the same word. Except one is a verb and one is a noun. They are two words that mean the same thing. lets see what the bible has to say about faith and belief
Hebrews 11:1 (King James Version)
Now **faith is the substance **of things hoped for, the evidence of things not seen.
God is telling us through His word, that faith, which is the same as believing, has SUBSTANCE. Substance implies energy is expelled, and expelled energy is considered work. Thus ur faith and belief in God has substance, which is considered work.
Now we are not saved by our works. Abraham was not saved by his work, However the bible clearly tells us that Abraham was accounted to God for his righteousness and his good work. So how do we tie all these in together. How did Abraham have faith if having faith of itself is considered work. How did Abraham do good work, if we are not saved by our work, what work is in question here.
Galatians 2:16 (King James Version)
Knowing that a man is not justified by the works of the law, but by the faith of Jesus Christ, even we have believed in Jesus Christ, that we might be justified by the faith of Christ, and not by the works of the law: for by the works of the law shall no flesh be justified.
It is because Abraham was accounted for righteousness because God, who is Christ, had faith in Abraham.
So to break this down.
God has saved Abraham. God has faith in Abraham, as a result of being a saved man, you have the faith of God, not your faith of your own desire to love God, but actual spiritual faith which is the faith that counts, given by God. As a result you have good works in your life.
If faith is the substance of things hoped for, then that is work, if faith is given you because Christ has paid for your sins, then that faith which is bestowed upon you is called a good work. Love is a good work. Reading the word of God and obeying it, is a good work. That is the only work that matters.
Works of law needs to be defined as vanity and your own will and desire for salvation. These dont count. Nothing you do will get you one step closer to heaven and being saved. you cannot take one giant step towards salvation by getting baptised, that is a work, you cannot take a step forward by accepting Christ, that is work and also called believing which is the substance of things hoped for. that is work and will not get you saved, charity, volunteer, tithing, adopting, giving, loving, these are all work that any person in the world can do, does this necessarily mean that person is saved… no.
only one indicator, and that is haveing absolute trust in the bible as the word of God. Even if you don’t understand, that is not the point, the point is that you trust what you read with all your heart. that you say i dont understand it, but i know it is perfect and absolute truth.
Good works are works that come as a result of being a saved person.
As we read the bible we will undoubtedly come across many verses that just make absolutely no sense. However the indication of a true child of God is to look at it and say, hey i may not understand it, but this is truth. This is exactly the way it is suppose to be. And you don’t question the validity of the account, or the merit, or the brutality, or the lesson, you accept it completely and trust it as being perfect. If you have this mentality, then asking a question is just fine because you seek to learn wisdom and bible doctrine never even once questioning if it is absolutely true or not.
i lost my train of though somewhere, if somebody is interested in a more succint answer let me know.