The four Berakhoth (blessings) during Habdalah are a sign for the success of the person during the week. Habdalah starts with the blessing of "Borei Peri HaGefen", on the wine. Wine is the pleasure of the taste in the mouth. The next blessing is " 'Asei Besamim", which is for the pleasure of the aroma, which is the domain of the nose.
After that, the third blessing is on the pleasure received by the eyes when they see the flame of the candle, and we recite "Borei Meorei Ha-Esh". Finally, the fourth Berakha is that of the Habdalah itself. This blessing depends on a person's ability to comprehend the concept of the separations and differences mentioned in it. The ability to comprehend is under the dominion of the brain.
What we see is that the blessings start with the lowest of these four parts of the body, working their way up to the uppermost one. This is all for a good sign for Mosi Shabbath, that a person's weekly matters will rise and grow, and not descend .
(See Meqabsiel, 2nd year, Wayyesei, Oth 61)
Moztzei Shabbat, Motzoei Shabbos, Mosi Shabbath, Siman Tov for a good week, Siman Tob, Habdalah, Havdalah