The Message of the Seven Thunders
The Message of the Seven Thunders (John 12:27-32)
.... “Rev 10:4”....
Notwithstanding, here are some clues (cf. Rev 10:3 ~ Amos 3:7-8):
Read other blog posts such as the following, and their linked posts, for more details:
...which should help understand the following emphases for EGW’s statements in 19MR 320-321:
...“After these seven thunders uttered their voices, the instruction[/“injunction” (Ms. 59, 1900)] comes to John as to Daniel in regard to the little book: "Seal up those things which the seven thunders uttered." These relate to future events which will be disclosed in their order. Daniel shall stand in his lot at the end of the days. [Dan 12:8-10, 13] John sees the little book unsealed. Then Daniel's prophecies have their proper place in the first, second, and third angels' messages to be given to the world. .... John heard the mysteries which the thunders uttered, but he was commanded not to write them.
The special light given to John which was expressed in the seven thunders was a delineation of events which would transpire under the first [Dan 7:13-14, 21-22, 26-27] and second [Dan 8:9-14; 23-26] angels' messages. It was not best for the people to know these things, for their faith must necessarily be tested. In the order of God most wonderful and advanced truths would be proclaimed. The first and second angels' messages were to be proclaimed, but no further light was to be revealed before these messages had done their specific work. This is represented by the Angel standing with one foot on the sea, proclaiming with a most solemn oath that time should be no longer.
This time, which the angel declares with a solemn oath, is not the end of this world's history, neither of probationary time, but of prophetic time, which should precede the advent of our Lord. [=Dan 12:7 vs. Rev 10:6, 7] That is, the people will not have another message upon definite time. After this period of time, reaching from 1842 to 1844, there can be no definite tracing of the prophetic time. The longest reckoning reaches to the autumn of 1844.
The Angel's position, with one foot on the sea, the other on the land, signifies the wide extent of the proclamation of the message. It will cross the broad waters and be proclaimed in other countries, even to all the world. The comprehension of truth, the glad reception of the message, is represented in the eating of the little book. The truth in regard to the time of the advent of our Lord was a precious message to our souls.
The greatest work to be done in this life is to make preparation for the future life, for that life which measures with the life of God. A probation has been granted us that, notwithstanding the difficulties, we may cultivate virtues which shall carry us into the higher life. Pure love for one another is exercised by those who are partakers of the divine nature.
... and help grasp the message in this culminating exegetical “delineation” of the message of the Seven Thunders:
[Click on Image to Enlarge]
 I.e., By definition, “a graphic or vivid verbal description”; “a drawing of the outlines of forms or objects”; “representation by drawing or painting etc”.