You Shall Love
V'ahavta et Hashem Elokeinu bechol levavcha uv'chol nafshcha uv'chol me-odecha
You shall love Hashem, your G-d, with all your heart, with all your soul and with all your resources.Vehayu had'varim ha-eleh asher anochi metzavcha hayom al levavecha
Let these matters that I command you today be upon your heart.
Veshinantam levanecha, vedibarta bam beshivtecha beveitecha uvlechtecha vaderech uv'shachbecha uvkumecha
Teach them thoroughly to your children and speak of them while you sit in your home, while you walk on the way, when you retire and when you arise.
Ukshartam le-ot al yadecha vehayu letotafot bein eynecha
Bind them as a sign upon your arm and let them be tefillin between your eyes.
Uchtavtam al mezuzot beitecha u-vish-arecha
And write them on the doorposts of your house and upon your gates.
The this passage of the Shema' is from Devarim 6:5-9 and begins with the word V'ahavta (You shall love). Reading this passage, along with the next two - V'haya and Vayomer, in this order is called Kriat Shema' (Reading of the Shema')
In the ancient Temple, after the Shema' was read, all three paragraphs were then recited aloud by the Kohanim following the daily morning offerings. (Tamid 5:1). The people assembled in the Temple courtyard did not join in this reading, but on hearing the first sentence of the Shema', they responded with:
Baruch shem kevod malchuto l'olam va-ed!
Blessed is the Name of His Glorious Kingdom forever and ever!This response is not a quotation of any biblical verse though it bears some similarities to a verse in Tehillim 72:19. This became the response to all blessings recited by the Kohanim in the Temple, including the Priestly Blessing. It was used in lieu of "Amein." It was also the response to the declaration, "Hear O YIsarel, Hashem is our G-d, Hashem is One!" (Taanit 16b; Yoma 6:2, 3:8).
This response was later transferred to the Synagogue as a standard part of the Shema'. In order to indicate that this sentence is not part of the Biblical passage of the Shema', it is customary to say it in a more subdued voice than the rest of the Shema' (Pesachim 56a). The only exception to this is on Yom Kippur when it is deliberately said aloud.
Sources:
Artscroll Siddur
To Pray As A Jew - Donin