Romans 11:6
And if by grace, then is it no more of works: otherwise grace is no more grace. But if it be of works, then it is no more grace: otherwise work is no more work.
It cannot be both Grace and works. They do not mix.
Eph 2:8,9
Ye are saved (justified) by grace through faith.....Faith is that we take God's word over our own and obey it.
Romans 10 wrote:8But what saith it? The word is nigh thee, even in thy mouth, and in thy heart: that is, the word of faith, which we preach;
9That if thou shalt confess with thy mouth the Lord Jesus, and shalt believe in thine heart that God hath raised him from the dead, thou shalt be saved.
10For with the heart man believeth unto righteousness; and with the mouth confession is made unto salvation.
That above is all that is necessary for justification. It is all him it is not us. He drew us and we responded in faith.
BUT ALSO
We are saved (sanctified) by grace through faith. We take God's word over our own and obey it.
All the rest of the commands, loving God and loving our neighbor are by grace through faith as well.
But faith comes by hearing the Word(rom 10:17). If you are not in the Word, you cannot increase in faith and therefore not increase in grace. It is only by increasing in grace that we start to show the fruit of the Spirit. Many people, Christians included, "try to look christian-like and serve God ", but very few people allow the Love of God to work though them. (I know I have been this way as well, but hopefuly I am growing in grace.)
Many new Christians do not immediately start studying the Bible. It may take them several years to get into it. And their life may not even show evidence of being a Christian. (consider Lot) Some never get into Bible study and die without any significant growth in grace.(think of thief on the cross). Some (most) are inconsistent in their obedience (consider David or Abraham or you or me)
1 Corinthians 3 wrote:
11 For other foundation can no man lay than that is laid, which is Jesus Christ.
12 Now if any man build upon this foundation gold, silver, precious stones, wood, hay, stubble;
13 Every man's work shall be made manifest: for the day shall declare it, because it shall be revealed by fire; and the fire shall try every man's work of what sort it is.
14 If any man's work abide which he hath built thereupon, he shall receive a reward.
15 If any man's work shall be burned, he shall suffer loss: but he himself shall be saved; yet so as by fire.
16 Know ye not that ye are the temple of God, and that the Spirit of God dwelleth in you?
We must be saved(justified) to have a foundation to build upon.
But the degree to which we are sanctified depends upon
man's work. But if our work is by allowing the love of God to work through us, then when that work is tested by fire then it will remain (gold, silver, precious stones). But for those works of ours that do not remain (because done with wrong motive) when tested by the fire, we do not get a reward for those.(suffer loss)
BUT WE ARE SAVED REGARDLESS - as long as we have trusted Christ for everlasting life.
Scripture shows us that we will receive rewards in heaven. But I also believe that those christians that do not use their gifts and finish their race (show the fruits), will have regrets in Heaven that they did not serve God in the way that they could have. But they are STILL saved(justifed).
2 Corinthians 5:10
For we must all appear before the
Judgment Seat of Christ; that every one may receive the things done in his body, according to that he hath done, whether it be good or bad.
Paul is including himself here. and he is speaking to Christians. Chritians will be judged, but never condemned to Hell. THe Great White Throne Judgement is for the unbelievers. The Judgment Seat of Christ is for believers.
Revelation 21:3-4
And I heard a great voice out of heaven saying, Behold, the tabernacle of God is with men, and he will dwell with them,
and they shall be his people, and God himself shall be with them, and be their God.
And God
shall wipe away all tears from their eyes; and there shall be no more death, neither sorrow, nor crying, neither shall there be any more pain: for the former things are passed away.
This is in the context where john is talking about a new heaven and a new earth. Which happens after a thousand years. God is going to wipe away the tears from the eyes of his people. So there must be some reason to cry during these thousand years. Could this be tears of regret? Mind you these tears do not have to be because of regrets for not serving, but it could be.