All things bear record · Psalms
2 witnesses of Christ here, and 2 further echoes from the reading.
O LORD God of my salvation, I have cried day and night before thee: Psalms 88:1
Even in total darkness the psalmist calls Jehovah 'God of my salvation.' Jehovah is the premortal Christ, the Savior.
How we know: Jehovah is the premortal Christ (Abraham 1:16; D&C 110:3–4)
For my soul is full of troubles: and my life draweth nigh unto the grave. Psalms 88:3–8
The sufferer is counted with the dead, feels God's wrath, and is left by his friends. That foreshadows the Savior, who was numbered with transgressors, felt the weight of sin, was laid in a grave, and whose acquaintance stood far off at the cross.
How we know: the verse itself names Him
Wilt thou shew wonders to the dead? shall the dead arise and praise thee? Selah. Psalms 88:10–12
The psalmist asks whether the dead can rise and praise God, expecting the answer no. Jesus Christ's Resurrection turns the answer to yes, and His ministry to the spirits of the dead showed His wonders to them too.
LORD, why castest thou off my soul? why hidest thou thy face from me? Psalms 88:14–18
The cry 'why hidest thou thy face from me' and being left without friends echo the loneliness of Christ, who was forsaken by His disciples and cried on the cross, 'My God, my God, why hast thou forsaken me?'