This is the teaching I offered late last night at our Tikkun Leyl Shavuot. It's loosely adapted from the Netivot Shalom, a.k.a. the Slonimer Rebbe, a.k.a. R' Shalom Noach Berezovsky. I originally translated it for a Hasidut class taught by R' Elliot Ginsburg; this version is streamlined a bit for easier teaching.
Someone once asked my teacher why on a first visit we can come directly to him and all the gates are opened to us, but on the second visit everything is closed. He answered with a parable:
You're taken up to the top of a high mountain, and you see the view that is all around you, and notice how glorious it is there. After that, you're brought back down to the bottom. And now, you must begin to climb up to the summit under your own power.
Once you see how wonderful it is up there, that encourages you to use your own strength to get back there. Initially, we receive enlightenment from above, that we might see with our own eyes how good it is to serve God. As Psalm 34 says, "Taste and see that God is good!"
After that, we're returned to our original (spiritual) place. But now we can go up on our own, now that we know where the heights are and how wonderful they are. That's what gives us the strength to push ourselves to climb.
On the first day of Pesach, we receive enlightenment from above. (It's as though we received a cosmic download of divinity, all compressed into a tight bundle, and we spend the 49 days of the Omer unpacking that download, lighting up each individual quality within ourselves which corresponds to the divine quality of that day.)
The energy, the potential, for climbing up to Shavuot comes from the illumination of that first day of Pesach. The first seder lights us up and inspires us to climb.
The seven weeks of the Omer are a time of spiritual preparation, during which we ready ourselves to receive the Torah. At the moment of the giving of the Torah, all seven heavens are open. All of our middot, the spiritual qualities which we share with God, are open and illuminated.
The experience of constriction, Mitzrayim, tarnished us. But on the first night of Pesach, God awakens us from on high. That awakening gives us the strength to spend the next seven weeks cleansing ourselves from the residue which accrues when we enslave ourselves to worldly things.
Pesach is a moment of erusin, betrothal, when Israel as a people becomes given-over to God. The 49 days of sefirat ha-Omer are a period of preparation and courting, preparing for the moment of being lifted-up. And at Shavuot, we and God are wed.
During the 49 days of the counting of the Omer, we "turn from evil and do good," again in the words of Psalm 34. We turn from the evil of enslavement, and pursue the goodness of receiving Torah. We turn from the evil of our own worst impulses and bad habits, and pursue the goodness of our best qualities (which we share with God.)
Throughout this journey, we draw on the energy we experienced on high, that first Passover night, to carry us the rest of the way to union at the mountaintop again.
And when we work for it; when we come seeking God; when we make the climb; we awaken the process of the revelation of the Torah. We needed to get here under our own power, and now that we've made it, the revelation is ready to pour in.
Have you experienced feeling 'lifted up,' then having to work to get back there?
How can you "turn from evil and do good" in your own life?
What is the Torah you most need to receive this year?
Quiet your mind, go inward, and ask the Holy Blessed One for revelation.