Shorter Catechism: Question 20

Q. 20. Did God leave all mankind to die in sin and misery?

A. 20. From all eternity and merely because it pleased Him, God chose some to have everlasting life. These He freed from sin and misery by a covenant of grace and brought them to salvation by a redeemer. 

Monday:

Almost as soon as Adam and Eve fell into sin and misery through their disobedience, God  made them a very comforting promise. God promised that someday  Someone would be born of a woman who would crush the head of Satan, who had deceived them. The Fall, with all its terrible consequences of  pain, death and the judgment of God, did not take God by surprise. He had always planned that His people would be His people because of what He would do for them, not because of what they would do for themselves. For centuries after the Fall, God's people waited for the birth of the One whom God had promised. The whole Old Testament looked forward to His coming. It contains many prophecies that Jesus fulfilled perfectly. Some of these Old Testament prophesies tell of what this Promised One would do for His people. He would save them from their sins and misery by taking the judgment their sins deserved and by living a life of perfect obedience to God in their place. For just one example of  such a prophesy written hundreds of years  before Jesus came:

Isaiah 53:5-6, 11

 5 But he was wounded for our transgressions;

he was crushed for our iniquities;

upon him was the chastisement that brought us peace,

and with his stripes we are healed.

6 All we like sheep have gone astray;

we have turned—every one—to his own way;

and the Lord has laid on him

the iniquity of us all.

11 Out of the anguish of his soul he shall see and be satisfied;
by his knowledge shall the righteous one, my servant,
make many to be accounted righteous,
and he shall bear their iniquities.

- Training Hearts, Teaching Minds: Family Devotions Based on the Shorter Catechism