And I saw another mighty angel come down from heaven, clothed with a cloud, and a rainbow was on his head, and his face was as the sun, and his feet as pillars of fire.
 And he had in his hand a little book open: and he set his RIGHT foot upon the SEA, and his LEFT foot upon the EARTH.
So we have the right foot, or biblically stronger foot, on the sea, or weakest foundation, and the left foot, or biblically weaker foot, on the earth, the strongest foundation.
What in the world could this bizarre Apocalypse Scripture mean? Now, there are several sources of truth, from the little book of God's mysteries, that Catholics extract truth from. Some sources are stronger in truth, some less. But there is this law: The stronger the degree of truth from a source, the weaker the foundation of evidence to legitimize it as a true source. Put another way, the weaker the degree of truth, the more evident is the source as legitimate:
Reason: The weakest source is Reason, since it only gives natural truth, or basic monotheism and natural law, but it is the most evident source; all men have reason and can plainly see it. No man may excuse himself from seeking out truth with reason. "The fool has said in his heart, there is no God."
Scripture: Scripture is less evident than Reason in the world, since only Christians have the full Scriptures. For example, the New World Indians only had reason before Europe came to them. Before the Spaniards came to the Aztecs, they did not have Scripture. No savage can ever have Scripture unless it is brought to him. So, again, whereas all men have reason, not all men have Scripture. Scripture is less evident. But it is the most evident source of Revelation. All three forms of Christendom accept the Scriptures. But the Scriptures are also the least reliable source of Revelation by themselves, since they are highly susceptible to misinterpretation without Tradition. Protestants only have Scripture, but they are all over the board on truth.
Tradition and Bishops: the evidence for General Apostolic Succession and Oral Tradition is less in the writings of the Fathers than for Scripture. The vast majority of ECF testimony is citing Scripture. Quotes that argue for valid Tradition are much less. So, again, Tradition and authoritative Apostolic Succession are less evident to humanity than Scripture. But Tradition is far more reliable than Scripture, since it gives the right interpretation. With only Tradition, the Orthodox would still have all their dogmas, even without Scripture. But again, the evidence for Tradition is less than Scripture, hence, only two of the three forms of Christendom accept Tradition, Orthodox and Catholic
Peter: Quotes in antiquity that speak of Peter's special office of infalliblity are far less than general quotes about Apostolic Succession. Therefore, Peter's special role in Apostolic Succession is less evident than General Apostolic Succession, hence why the Orthodox do not accept him. But Peter is even stronger in truth than his other brothers combined, since with Peter, the fullness of truth on earth is known in Catholicism. Hence why the Orthodox are a little bit in error and debate a thousand years of what we know to be certain dogma.
Addendumm: The Trinity and Incarnation lies even above Peter, since God is the ultimate source of truth, but those mysteries are so elusive, so hidden!
Hence, the strong foot rests on the sea, a weak foundation, and the weak foot rests on the earth, a strong foundation.
Strong sources of truth rest on weaker evidence, and weaker sources of truth rest on stronger evidence!
How is that for an Apocalypse 10 Interpretation?
For deeper theology that applies this analysis to the Crucified Feet of Christ, see this previously published article: