Holy Zohar text. Daily Zohar -383.

Tikkun 21 – 124

At the Revelation time the light of the Torah’s Cantillation will shine. Shofar Mehuach (in the reverse direction) `Kadma, Zakef Katan.
They represent the reversal of power that will shift from the nations of the world to the Israelites.

Jacob represents the central column and the balance of the world. As the father of the 12 tribes, and with the name change from Jacob to Israel, he started the correction of the Israelites.
Genesis 32:11 “קָטֹנְתִּי מִכֹּל הַחֲסָדִים, וּמִכָּל-הָאֱמֶת, אֲשֶׁר עָשִׂיתָ, אֶת-עַבְדֶּךָ”
“I am not worthy of all the mercies, and of all the truth, which you have shown to your servant;”

With the revelation of the Torah on Mount Sinai, the nation of Israel had the tool to work on their correction.
Initially Jacob was in a state of smallness but when we get to the end of the tikkun the nation of Israel will stand in a greater state to receive the new Torah. The Israelites then will have full control over the central column and as it is said
Exodus 15:1 “אָז יָשִׁיר-מֹשֶׁה וּבְנֵי יִשְׂרָאֵל”
“Then Moses and the children of Israel will sing this song…”