John 14:6 Jesus said to him, I am the way and the reality and the life; no one comes to the Father except through Me. 1 Cor1:30 But of Him you are in Christ Jesus, who became wisdom to us from God: both righteousness and sanctification and redemption,
What are these holy and trustworthy things? They are all the aspects of what Christ is. According to the New Testament, Christ is life, light, grace, righteousness, holiness, sanctification, and justification.
He is also the bread of life and the living water. Furthermore, the holy and trustworthy things include all the aspects of Christ unveiled in 1 Corinthians: power, wisdom, righteousness, sanctification, redemption, glory, the depths of God, the unique foundation of God's building, the Passover, the unleavened bread, the spiritual food, the spiritual drink, the spiritual rock, the Head, the Body, the firstfruit, the second Man, and the last Adam.
We see many more aspects of Christ in the Gospel of John, such as the Shepherd and the pasture. Oh, how much Christ is to us as the holy and trustworthy things! As the resurrected One, He is the firstborn Son, the Savior, and all the holy and trustworthy things.
In the Old Testament the holy and faithful things are regarded as mercies. Do you know what mercy is? Mercy implies both love and grace, but it reaches further than love.
Where love and grace cannot reach, mercy can reach. All the holy and faithful things are Christ Himself as mercies to us. Life is mercy, and light is also a mercy.
Try to count all the aspects of these mercies. If you took the time to count them, you would have a long list of mercies.