An unapproachable God made approachable. The mystery of the Gospel of Jesus Christ that brings both Spiritual and Physical Salvation! This God is still yet unapproachable. I imagine Moses and the people of Israel:
18 Now all the people witnessed the thunderings, the lightning flashes, the sound of the trumpet, and the mountain smoking; and when the people saw [it], they trembled and stood afar off. – Exo 20:18 NKJV
There is a startling reality of how unapproachable God is! Out of Fear of God, they trembled and stood afar off! It was only but a select few that could come up on the mountain without being killed by God’s utter Holiness!
Where has this fear of God gone? Just because Jesus came does not make God any less approachable! He is the same God! Without true Salvation found only through Jesus Christ, you cannot approach the One who sits on the Throne of Heaven! The mystery of the Gospel! To be clothed in the perfect righteousness of Christ!
There is a reason why Paul speaks of this to the Philippians!
5 Let this mind be in you which was also in Christ Jesus, …
7 but made Himself of no reputation, taking the form of a bondservant, [and] coming in the likeness of men.
8 And being found in appearance as a man, He humbled Himself and became obedient to [the point of] death, even the death of the cross. …
10 that at the name of Jesus every knee should bow, of those in heaven, and of those on earth, and of those under the earth, 11 and [that] every tongue should confess that Jesus Christ [is] Lord, to the glory of God the Father.
12 Therefore, my beloved, as you have always obeyed, not as in my presence only, but now much more in my absence, work out your own salvation with fear and trembling;
13 for it is God who works in you both to will and to do for [His] good pleasure. – Phl 2:5, 7-8, 10-13 NKJV
Fear: phobos; That what strikes terror, or a reverential fear not wanting to displease
This fear that Paul speaks of is not just the type of fear found in Exodus, a controlling motive of life, in matters spiritual and moral, not a mere “fear” of His power and righteous retribution, but a wholesome dread of displeasing Him
Trembling: tromos; quaking or shaking in fear, used to describe the anxiety of one who distrusts his ability completely to meet all requirements, but religiously does his utmost to fulfil his duty
We must not forget the state of our humanity. We must not forget that God is a Holy God, and straying from His path comes with consequences, but we must also understand what a good Father He is and allow the fear of displeasure to help motivate.