Toil Before Heavenly Flow

בפסוק יערף כמטר כי בתחלה צריכין להלחם וללמוד מתוך הקישוי ואח"כ זוכין להיות תזל כטל אמרתי כדאיתא תחלתו מר וסופו מתוק

On the pasuk "Ya'arof kamatar lik'chi — My teaching shall drop like the rain" (Devarim 32:2): at the outset one must do battle and toil in Torah amid difficulty and struggle, and only afterward does one merit the level of "tizal katal imrasi — My word shall flow like the dew," as is brought down that its beginning is bitter but its end is sweet.

The Sfas Emes teaches that Torah begins like driving rain — demanding effort and struggle — and only through that initial hardship does one rise to receive Torah as gently as dew, for what starts out bitter ends up sweet.

וכ"כ שתה מים מבורך הוא הכח שהטמין הבורא ית' בנפש האדם וצריכין לייגע למצוא זה הכח אח"כ נוזלים הוא הסיוע מלמעלה במתנה כנ"ל:

So too it is written, "Drink water from your own cistern" (Mishlei 5:15) — this refers to the power that the Borei Yisbarach concealed within the soul of man, and a person must exert himself to find this hidden power; afterward come the "flowing waters," which are the assistance from Above granted as a gift, as explained above.

He compares the inner spiritual power Hashem hid within the neshamah to water in one's own cistern that must be labored for; once a person digs for it through his own avodah, Hashem grants further help from Above as a free gift.

Summary: The Sfas Emes contrasts two images from the pasuk in Ha'azinu: rain, which falls with force, and dew, which descends gently. He explains that avodas Hashem and limud haTorah begin with the difficulty of rain — one must battle and toil amid struggle — and only after enduring that hardship does a person merit the sweet, effortless flow of dew, for the beginning is bitter and the end is sweet. He links this to the pasuk in Mishlei, "Drink water from your own cistern," understanding it as the hidden power the Borei Yisbarach planted within the neshamah, which a person must exert himself to uncover. Once a Yid digs for that power through his own labor, the "flowing waters" of siyata diShmaya are granted to him from Above as a gift.