G-d's Multifaceted Kedusha Plan
It started back in Sh'mot 19, the portion of Parshat Yitro that describes our arrival at Sinai and our preparation to receive the Torah. AND YOU SHALL BE UNTO ME A KINGDOM OF KOHANIM AND A HOLY NATION. This statement of G-d's was not an unconditional prophecy but rather part of the Deal He was presenting us with. The previous pasuk states, AND NOW (having taken you out of Egypt on the wings of eagles), IF YOU HEARKEN WELL TO ME, AND KEEP MY COVENANT, THEN YOU WILL BE MY MOST BELOVED TREASURE... Our becoming a Holy Nation is conditional upon our continuous faith in G-d and observance of Torah and Mitzvot. Not only is that a precondition to our holiness, it is the only way for us to attain holiness.

In last week's sedra of K'doshim, the command to be holy is given, so to speak, to each of us — not just collectively as KLAL YISRA'EL. The command and challenge for each of us to be holy is accompanied by the reason (so to speak) and the incentive and inspiration to be holy - because G-d is Holy. This is stated more than once in K'doshim. And sanctity is a major theme of Parshat Acharei Mot, and of this week's sedra of EMOR.

We are not left to our own devices in our pursuit of Holiness, as has been pointed out in last week's TT and many other times besides. The three-sedra unit of Acharei-K'doshim-Emor, which this year (and all 12-month, 1-Adar years) is read over just two week's time, contains 142 of the Torah's Taryag mitzvot – more than 23% of the mitzvot. And each of them – really, each and every mitzva –says keep this mitzva and thereby become holy. Or at least be a step further on the path to holiness. 

And, as we've also mentioned before, it is not just the doing of the mitzva and the avoidance of the prohibitions, but it is the intentions and attitudes we have towards Torah and Mitzvot, that will (or not) lead us to holiness.
And that brings us to the midpoint of Parshat Emor, with the next phase in G-d's plan for our (and His) holiness.

AND YOU SHALL PRESERVE MY COMMANDMENTS AND DO THEM, I AM HASHEM. AND YOU SHALL NOT DESECRATE MY HOLY NAME (by intentionally violating mitzvot - Rashi) [BUT RATHER] YOU SHALL SANCTIFY ME... (Vayikra 22:31-32)

Our doing mitzvot, and the way we do mitzvot, not only can help us on our quest for holiness, as individuals and as a nation, but it can also bring about the sanctification of G-d.

And that was the "reason" for His command to us to be holy, in the first place. And this KIDDUSH HASHEM is possible, not only with mitzvot, but with any and every mundane act.