The Lord is at the center of scripture and our salvation. There isn't a single thing that we can offer to gain righteousness. We are wholly at the mercy of God and His Grace given to us. These things are foreign to us and not intuitive to our fallen nature. This is one reason why it is so desperately important to preach the Gospel on a regular basis. It isn't just for evangelizing the lost. It is also for Christians at all stages of their faith. It is important to be remind us all of our guilt, and how marvelous grace is, and how we can't help but love one another and share the Gospel out of Gratitude for what God has done. This should help to keep us humble and not proud. A grateful Christian would not be like a Pharisee pointing fingers at those sinners outside the church.
2 Corinthians 5:17 Says -
Therefore, if anyone is in Christ, he is a new creation; the old has gone, the new has come!
Notice that the change comes after someone is in Christ. We don't try to change people and then they become Christians. The old has gone and the new has come.
Next, it is evident that scripture shows us that Christ sought out those "He foreknew". He reached out to those that belonged to Him, and all the way to the cross he died for those "He foreknew".
Jesus didn't go to the cross so that people will have the "chance" to be saved. But, he went to the cross so that specific people would certainly be saved. Those given to Him before the foundations of the world, and he hasn't lost a single one. John 17
Grace and Peace,
Lord’s Day 6
16. Why must He be a true and righteous man?
Because the justice of God requires that the same human nature which has sinned should make satisfaction for sin; but one who is himself a sinner cannot satisfy for others.
 Rom 5:12, 15; 1 Cor 15:21; Heb 2:14-16;  Isa 53:3-5; Heb 7:26-27; 1 Pt 3:18
17. Why must He also be true God?
That by the power of His Godhead He might bear in His manhood the burden of God’s wrath, and so obtain for and restore to us righteousness and life.
 Isa 9:5;  Dt 4:24; Isa 53:8; Ps 130:3; Nah 1:6; Acts 2:24;  Jn 3:16; Acts 20:28;  Isa 53:5, 11; 2 Cor 5:21; 1 Jn 1:2
18. But who now is that Mediator, who in one person is true God and also a true and righteous man?
Our Lord Jesus Christ, who is freely given unto us for complete redemption and righteousness. 
 Mt 1:21-23; Lk 2:11; 1 Tim 2:5, 3:16;  Acts 4:12; 1 Cor 1:30
19. From where do you know this?
From the Holy Gospel, which God Himself first revealed in Paradise, afterwards proclaimed by the holy patriarchs and prophets, and foreshadowed by the sacrifices and other ceremonies of the law, and finally fulfilled by His well-beloved Son.
 Gen 3:15;  Gen 12:3, 22:18, 49:10-11;  Isa 53; Jer 23:5-6; Mic 7:18-20; Acts 3:22-24, 10:43; Rom 1:2; Heb 1:1;  Lev 1:7; Jn 5:46; Heb 10:1-10;  Rom 10:4; Gal 4:4-5; Col 2:17; Heb 10:1