The doctrine of the Blessed Hope explains and extends grace in areas regarding infants, young children, and the MRDD. Whereas other theological frameworks do not. Most (even the most theologically conservative) believers believe that, in some way, the propitiation of Christ's cross is applied to infants, young children, and the MRDD. In doing this they establish that there is indeed a thread of "exception", and that salvation as we know it isn't always able to be legalistically applied to all in this life. Most who walk after the Spirit can "sense" this reality. However, nearly 1600 years of various church traditions have clouded our spiritual vision.
Romans 9:15
For he saith to Moses, I will have mercy on whom I will have mercy, and I will have compassion on whom I will have compassion.
1 John 2:2
And he is the propitiation for our sins: and not for ours only, but also for the sins of the whole world.
1 Timothy 2:4
Who will have all men to be saved, and to come unto the knowledge of the truth.
1 Peter 3:18-20
18 For Christ also hath once suffered for sins, the just for the unjust, that he might bring us to God, being put to death in the flesh, but quickened by the Spirit:
19 By which also he went and preached unto the spirits in prison;
20 Which sometime were disobedient, when once the longsuffering of God waited in the days of Noah, while the ark was a preparing, wherein few, that is, eight souls were saved by water.
1 Corinthians 3:13-15
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.
Revelation 1:18
I am he that liveth, and was dead; and, behold, I am alive for evermore, Amen; and have the keys of hell and of death.
According to the Blessed Hope, Jesus Christ is truly Saviour of the world.
Luke 3:6
And all flesh shall see the salvation of God.