Students of God's Word understand Grace to be the unearned, or unmerited favor of God toward sinful man. The Scriptures teach us that we are sinners worthy of death, that we cannot do enough religious works to make up for our sin, and that it is only by trusting in the finished work of Christ, on our behalf, that we can be saved from the penalty of our sin (Rom. 3:23; 5:8; 6:23; Gal. 3:1-3; Eph. 2:8-9; etc.). Ephesians 2:8-9 says, "For by grace are ye saved through faith; and that not of yourselves: it is the gift of God: not of works, lest any man should boast."
Over the years, I have heard grace expressed as God's Riches At Christ's Expense. God, motivated by love for fallen mankind, sent His Son to pay for our sin so that we could become children of God (Jn. 3:16; 1:11-12; Lk. 2:36; Rom. 8:14-16; Gal. 3:26; 1 Jn. 3:1-2; etc.). As God's adopted children, we have become joint heirs with Christ; all that belongs to Him will one day belong to us (Rom. 1:15; Gal. 4:5-7; Eph. 1:5; Titus 3:7; Jam. 2:5; etc.). Do we deserve anything but the wrath of God? NO! But God loves us and gives us what we do not deserve; that is grace! By the way, mercy is not getting what we do deserve!
Do you know the best way to tell if someone is a genuine born again believer? While many would say it is the Fruit of the Spirit, because Jesus said, "By their fruit ye shall know them" (Gal. 5:22-23; Mt. 7:16, 20), the "fruit" is easy to fake, and the Lord's comment had to do with identifying false teachers. In my experience, the best way to identify a brother or sister in Christ is by their humility. A genuine believer realizes that their relationship to the Father is 100% the result of His grace!
The mark of a true believer is a grateful, humble heart!
8 Salvation that comes from trusting Christ -- which is the message we preach -- is already within easy reach. In fact, the Scriptures say, "The message is close at hand; it is on your lips and in your heart." 9 For if you confess with your mouth that Jesus is Lord and believe in your heart that God raised him from the dead, you will be saved. 10 For it is by believing in your heart that you are made right with God, and it is by confessing with your mouth that you are saved. 11 As the Scriptures tell us, "Anyone who believes in him will not be disappointed. " 12 Jew and Gentile are the same in this respect. They all have the same Lord, who generously gives his riches to all who ask for them. 13 For "Anyone who calls on the name of the Lord will be saved."
14 But how can they call on him to save them unless they believe in him? And how can they believe in him if they have never heard about him? And how can they hear about him unless someone tells them? 15 And how will anyone go and tell them without being sent? That is what the Scriptures mean when they say, "How beautiful are the feet of those who bring good news!" 16 But not everyone welcomes the Good News, for Isaiah the prophet said, "Lord, who has believed our message?" 17 Yet faith comes from listening to this message of good news -- the Good News about Christ. 18 But what about the Jews? Have they actually heard the message? Yes, they have: "The message of God's creation has gone out to everyone, and its words to all the world." 19 But did the people of Israel really understand? Yes, they did, for even in the time of Moses, God had said, "I will rouse your jealousy by blessing other nations. I will make you angry by blessing the foolish Gentiles." 20 And later Isaiah spoke boldly for God: "I was found by people who were not looking for me. I showed myself to those who were not asking for me." 21 But regarding Israel, God said, "All day long I opened my arms to them, but they kept disobeying me and arguing with me."