1. But the righteous will live by their faith. (Ezk 14:14-20)
    Ezk 18:2-4, 20, Heb 11:6-7, Rom 1:17

In the Old Testament, God said that people would be saved by believing in Him themselves. In other words, we cannot be saved through the faith of others. (Eze 14:14-20, Eze 18:2-4, 20)

Eze 14:14 Though these three men, Noah, Daniel, and Job, were in it, they should deliver but their own souls by their righteousness, saith the Lord God.
15 If I cause noisome beasts to pass through the land, and they spoil it, so that it be desolate, that no man may pass through because of the beasts:
16 Though these three men were in it, as I live, saith the Lord God, they shall deliver neither sons nor daughters; they only shall be delivered, but the land shall be desolate.
17 Or if I bring a sword upon that land, and say, Sword, go through the land; so that I cut off man and beast from it:
18 Though these three men were in it, as I live, saith the Lord God, they shall deliver neither sons nor daughters, but they only shall be delivered themselves.
19 Or if I send a pestilence into that land, and pour out my fury upon it in blood, to cut off from it man and beast:
20 Though Noah, Daniel, and Job were in it, as I live, saith the Lord God, they shall deliver neither son nor daughter; they shall but deliver their own souls by their righteousness.

Eze 18:2 What mean ye, that ye use this proverb concerning the land of Israel, saying, The fathers have eaten sour grapes, and the children’s teeth are set on edge?
3 As I live, saith the Lord God, ye shall not have occasion any more to use this proverb in Israel.
4 Behold, all souls are mine; as the soul of the father, so also the soul of the son is mine: the soul that sinneth, it shall die.
20 The soul that sinneth, it shall die. The son shall not bear the iniquity of the father, neither shall the father bear the iniquity of the son: the righteousness of the righteous shall be upon him, and the wickedness of the wicked shall be upon him.

In order to please God, we must believe that God exists. (Heb 11:6-7)

Heb 11:6 But without faith it is impossible to please him: for he that cometh to God must believe that he is, and that he is a rewarder of them that diligently seek him.
7 By faith Noah, being warned of God of things not seen as yet, moved with fear, prepared an ark to the saving of his house; by the which he condemned the world, and became heir of the righteousness which is by faith.

Ultimately, we are saved by believing in Christ Jesus, the righteous man of God. (Romans 1:17)

Romans 1:17 For therein is the righteousness of God revealed from faith to faith: as it is written, The just shall live by faith.