Sheva Brachot : Blessing 7

Baruch atah Adonai Eloheinu melech ha-olam, asher bara sason v’simcha chatan v’kallah, gilah rinah ditzah v’chedvah, ahavah v’achavah v’shalom v’reut. M’hera Adonai Eloheinu yishammah b’arei Yhudah uv-chutzot Y’rushalayim kol sason v’kol simcha, kol chatan v’kol kalah, kol mitzhalot chatanim meichupatam u-n'arim mimishte n’ginatam. Baruch ata Adonai, m’sameiach chatan im hakalah. 

Blessed are You, LORD, our God, sovereign of the universe, who created joy and gladness, groom and bride, mirth, song, delight and rejoicing, love and harmony and peace and companionship. Quickly, LORD our God, there should be heard in the cities of Judah and in the courtyards of Jerusalem the voice of joy and the voice of gladness, the voice of groom and the voice of bride, the jubilant voices of grooms from the bridal canopy, and of young people from the feast of their singing. Blessed are You, LORD, Gladdener of the groom with his bride.

This blessing is characterized by two numbers: ten and five.

The blessing uses ten adjectives to describe the atmosphere which will hopefully pervade the home of the newlywed couple: 1) Joy. 2) Happiness. 3) Gladness. 4) Jubilation. 5) Cheer. 6) Delight. 7) Love. 8) Friendship. 9) Harmony. 10) Fellowship.

Ten is a complete number. The blueprint of creation is the Torah, whose essence is contained in the Ten Commandments. As a result, the world was created with ten supernal building blocks — the ten Divine Attributes (sefirot) — which manifested themselves in the Ten Utterances with which G‑d created the world.4

The concluding blessing of the Sheva Brachot wishes the bride and groom a life of perfect happiness. A happiness which permeates every aspect of their beings.

The number five represents the divine core which utterly transcends creationBut completion isn't enough. The blessing continues with enumerating the five "sounds"; five being a number which symbolizes the transcendence of perfection.

The world was formed using four basic elements: fire, wind, water and earth. Creation is subdivided into four categories: the human race, the crown jewel of creation; the animal kingdom; the world of vegetation; and all inanimate creations. The quadruple nature of creation expresses itself in many more areas as well, such as the four seasons and four directions. This numerical theme is a result of the world's sustaining force — the four letters of the Tetragrammaton.5

The number five represents the divine core which utterly transcends creation.6 The Jewish soul is a reflection of this idea, containing four levels which express its own identity, and then a fifth level, the yechidah, which is the divine core of the soul.

Marriage is when the souls of the bride and groom finally reach completeness — ten — and then use that accomplishment as a springboard to tap into the divine essence of their souls and the world at large — five — which is infinitely higher than any completion mere creations can possibly reach on their own.