As we know, the mercy land as revealed to CCC is a replica of the garden of gesthamane where Christ Jesus had his final:
1. fellowship with his disciples (who were all fast asleep),
2. prayer session with God in preparation for his tribulation with angelic visitation and
3. where he was finally betrayed, performed a miracle  and got arrested.

1,2 and 3 represent a mixture of the good, bad and ugly experiences of life but never still, becoming victorious. It must be recalled that the garden of gesthamane itself is a picture of the garden of Eden where

1' God fellowshipped with man;
2' man was in charge of the animals, was given  assignment to keep the garden, got married and;
3' the serpent operated, deceived man and  man was sent out.

The mercy land of CCC portrays to us a scenario of  being in a no man's land (desert/wilderness), faced with supernatural challenge of drought (restlessness), famine (lack), intense itching of the sun (difficulties and challenges)  but the mercy of God providing *a well of water*  to quench our spiritual  thirst , *fruits on trees*  for spiritual food, shade and the *presence of God* which watches over us day and night (7 candle lamp stand)Haggai had that experience with his child. Jonah also (Jonah 4).

The sand of the seashore is in line with Rom 9:27 Esaias also crieth concerning Israel, Though the number of the children of Israel be as the *sand of the sea, a remnant shall be saved and out of God's saving mercy* depict ...

1" walking on harmless terrain (no stones or thorns or thistles or hard objects to pitch our feet;
2" life with no struggle (weeds do not grow in sand and sand is soft to dip hands into and drains water);
3" life with no dirt (the sand has no dust)

1,2,3,  1',2',3' , 1", 2", 3" correspond....

1", 2", 3" are a reverse of the curses of God on the land in

Gen 3:
 17  And unto Adam he said, Because thou hast hearkened unto the voice of thy wife, and hast eaten of the tree, of which I commanded thee, saying, Thou shalt not eat of it: *cursed is the ground* for thy sake; in *sorrow shalt thou eat of it* all the days of thy life; (Compare)

 18  *Thorns also and thistles* shall it bring forth to thee; and thou shalt eat the herb of the field;
 19  In the *sweat of thy face* shalt thou eat bread, till thou return unto the ground; for out of it wast thou taken: *for dust thou art, and unto dust* shalt thou return.

Note, the serpent was cursed to eat dust (not sand).
Gen 3:
14  And the LORD God said unto the serpent, Because thou hast done this, thou art cursed above all cattle, and above every beast of the field; upon thy belly shalt thou go, and *dust* shalt thou eat all the days of thy life. Dust represents a natural man (adamic nature). The devil has control over such. Snakes struggle to move on sand! Hence, for a son of the spirit who enjoys God's mercy in the mercy land style, he is satanically unreachable,  touchable, and not consumable.This is why God used 2 things to describe the descendants of Abraham to him:

1. stars of the sky (celestial);
2. Sands of the sea shore (eternally alive).

Terrestrial is dusty while celestial is starry and sandy. This is why we not sprinkle  dust at CCC burial or bring dead bodies into the church. We sprinkle water. Sand is water washed!