1,145 Hebrew letters and 44 English, with 699 in the 1950s. "Reach every single Jew" is the largest formula (177 letters, 114 in the 1950s); spreading the wellsprings (59) is concentrated in the same decade. The method tempers the total goal: draw close, never repel (kiruv halevavos over being right); by stages — "little by little I will drive them out," and a slow start is not failure. The signature: one mitzvah counts, because a mitzvah draws another.
The 1950s carry it again (699 of 1,145) — the founding decade of the campaigns, when he was recruiting and steadying the first wave of shluchim. The refrain that leads all others: reach every single Jew.
The recurring calls, by how often they appear across the 1,145 letters.
"Every single Jew" is the outreach imperative — kol echad v’echad — and it dominates in the 1950s (114) as the campaigns take shape.
"Every single Jew" (177) peaks in the founding 1950s (114) and continues through — the non-negotiable premise that no Jew is written off or out of reach.
"Spread the wellsprings" (59) is concentrated in the 1950s (44) — the Chassidus-dissemination language that would later crystallize into the public mivtzoim.
Where the vision is total, the method is patient: "little by little I will drive them out" — expansion by stages, so a slow start is never cause for despair (§04).
The aim is maximal — every Jew, the wellsprings everywhere. But the letters temper the how. Draw close, never repel (the right hand brings near). Proceed by stages — "little by little," so a slow or invisible start is no reason to lose heart. And never belittle a single mitzvah: one leads to the next. Here that counsel, verbatim.