Preparation and willing heart outweigh the deed

במדרש תנחומא דרך עצל כמשוכת חדק ואורח ישרים סלולה.

In the Midrash Tanchuma: "The way of the lazy man is like a hedge of thorns, but the path of the upright is a paved highway" (Mishlei 15:19).

The Sefas Emes brings the pasuk contrasting two kinds of people: for the lazy one, his path is obstructed and thorny, while for the upright it is smooth and clear.

משמיעין באדר וגובין בניסן.

"They announce [the half-shekel] in Adar and collect it in Nisan" (Shekalim 1:1).

The Mishnah teaches that the call to give the machatzis hashekel was made a full month before the actual collection — and the Sefas Emes will explain why that interval matters.

הענין כי נתנו זמן חודש להכנת הנדבה.

The matter is that they gave a month's time for the preparation of the donation.

The advance announcement was meant to allow a whole month of hachanah (preparation) for giving the contribution.

להיות כי אין המכוון השקל.

This is because the goal is not the shekel itself.

The essential aim of the mitzvah is not the coin that is handed over.

רק הרצון ונדיבות הלב.

Rather, it is the will and the generosity of the heart.

What Hashem truly desires is the ratzon (inner will) and the open-hearted nedivus (generosity) behind the gift.

לכן הכנת המצוה חביב יותר מהעיקר.

Therefore the preparation for the mitzvah is more beloved than the main act itself.

Since the heart's desire is the essence, the period of anticipating and preparing for the mitzvah is even dearer than the physical performance of giving.

וזהו השמחה של מצוה.

And this is the simchah shel mitzvah (the joy of a mitzvah).

This eager preparation and longing of the heart is the very source of the joy that should accompany a mitzvah.

והרמז לזה שהותר בנדבת בני ישראל.

And the hint to this is that there was a surplus in the donation of Bnei Yisrael.

The Torah records that the people gave so much for the Mishkan that there was more than enough — a sign of how their hearts overflowed beyond the bare requirement.

להודיע כי הנדבה והרצון עולה יותר מגוף העשי'.

To make known that the donation and the will ascend higher than the physical act itself.

The leftover materials demonstrate that the willing heart and the desire to give are valued even more than the actual deed of giving.

אבל דרך עצל מסים וארנונות של הרשעים שכוונתם רק הממון לכן נק' דרך עצל:

But "the way of the lazy man" refers to the taxes and levies of the wicked, whose only intent is the money — therefore it is called "the way of the lazy."

In contrast to the joyful, heartfelt giving of Bnei Yisrael, the wicked care only for the cash extracted; lacking any inner ratzon, their giving is lifeless and thorn-choked — the "way of the lazy."

Summary: The half-shekel was announced a month early to give Bnei Yisrael time to prepare with eager, generous hearts, because the essence of a mitzvah is the inner will and the joy of preparing for it, not the physical object. This heartfelt giving — reflected in the surplus donations for the Mishkan — is the "path of the upright," whereas giving that aims only at money is the lifeless "way of the lazy."