Temimus and bitachon bring security above nature

במדרש אז תלך לבטח.

In the Midrash: "then you shall walk securely."

The Midrash applies this pasuk from Mishlei to Yaakov Avinu as he departs.

כי באמת ברח יעקב מפני עשו.

For in truth Yaakov fled from before Esav.

On the surface, Yaakov was running away in fear of his brother Esav.

אעפ"כ כתיב ויצא וילך לא בלשון בריחה כי הבוטח בה' באמת מבין כי מה' מצעדי גבר ולא יתלה הדבר במקרה זהו בחי' יעקב איש תם כמ"ש רש"י בפסוק תמים תהי' קבל הכל בתמימות.

Nevertheless it is written "and he went out and he walked" — not in the language of fleeing — for one who truly trusts in Hashem understands that "from Hashem are a man's steps," and does not attribute the matter to chance. This is the aspect of Yaakov, "a wholesome man (ish tam)," as Rashi writes on the pasuk "be wholehearted (tamim)": accept everything with simplicity (temimus).

Though Yaakov was fleeing, the Torah describes him as calmly "going," because his bitachon in Hashem let him see his journey as guided by Hashem rather than driven by fear or chance — the trait of temimus, accepting all that comes with wholehearted trust.

ולא נשתנה כלל ע"י בריחה זו וזה מדת השתוות שכתב בחובת הלבבות.

And he was not changed at all by this flight — and this is the trait of equanimity (hishtavus) of which the Chovos HaLevavos writes.

Yaakov's inner state remained perfectly steady despite the upheaval, embodying the trait of equanimity described by the Chovos HaLevavos — being unmoved by fortune's ups and downs.

אז הוא התקשרות בשורש שלמעלה מן הטבע כמ"ש בספרים א' על ז' ימי הטבע.

Then there is a connection to the root that is above nature, as the sefarim write: the One over the seven days of nature.

Such equanimity bonds a person to the divine root that stands above the natural order — the "One" that transcends the seven days of the natural week.

וזהו עצמו פי' באר שבע המקור שמשם נובעין ז' הימים והוא אור שבעת הימים ולפי שיעקב הי' לו דביקות שם לכן ויצא וילך לבטח כמ"ש.

And this itself is the meaning of "Be'er Sheva" (the well of seven) — the source from which the seven days flow forth, and it is the light of the seven days; and because Yaakov had a clinging (devekus) there, therefore "he went out and walked" securely, as stated.

"Be'er Sheva" alludes to the wellspring above time from which the seven days draw their light; Yaakov's devekus to that supernal source kept him secure and serene as he set out.

וכ"כ הולך בתם ילך בטח:

And so it is written: "one who walks in wholesomeness (tom) walks securely."

The pasuk confirms that the person of temimus, anchored in Hashem above nature, walks through life in security.

Summary: Though Yaakov Avinu fled from Esav, the Torah portrays him as calmly "going," because his temimus and bitachon let him see Hashem directing every step rather than blind chance. This equanimity (hishtavus) bonds a person to the supernal root above nature — alluded to in "Be'er Sheva," the wellspring of the seven days — and so the one who walks in wholeness walks securely.