Spurgeon

“O worship the Lord in the beauty of holiness.”
This is the only beauty which he cares for in our public services, and it is one for which no other can compensate.
Beauty of architecture and apparel he does not regard;
moral and spiritual beauty is that in which his soul delighteth. Worship must not be rendered to God in a slovenly, sinful, superficial manner;
we must be reverent, sincere, earnest, and pure in heart both in our prayers and praises.
Purity is the white linen of the Lord's choristers, righteousness is the comely garment of his priests, holiness is the royal apparel of his servitors.
“Fear before him, all the earth.” “Tremble” is the word in the original, and it expresses the profoundest awe, just as the word “worship” does, which would be more accurately translated by “bow down.”
Even the bodily frame would be moved to trembling and prostration if men were thoroughly conscious of the power and glory of Jehovah.
Men of the world ridiculed “the Quakers” for trembling when under the power of the Holy Spirit;
had they been able to discern the majesty of the Eternal they would have quaked also.
There is a sacred trembling which is quite consistent with joy, the heart may even quiver with an awful excess of delight.
The sight of the King in his beauty caused no alarm to John in Patmos, and yet it made him fall at his feet as dead.
Oh, to behold him and worship him with prostrate awe and sacred fear!
From The Treasury of David, by Charles Haddon Spurgeon, exposition of Psalm 96:9