Introductions to new laws in the Torah are typically formal and rigid. However, the introduction to the commandment of the fringes presents a striking exception, revealing a deep connection to the events that just took place. Rather than using the standard, firm language of instruction, God speaks with a soft, affectionate, and appeasing tone [אור החיים, שפתי כהן].
This gentle approach directly stems from the preceding incident of the man who gathered wood on the Sabbath. Witnessing this public violation, Moses approached God with deep concern. He worried about how the Israelites would remember their spiritual duties on the day of rest, a time when they do not wear phylacteries. In response, God provided the commandment of the fringes. By using a softer tone, God comforts Moses, supports him, and offers a calming solution to his profound worry [אור החיים].
The incident with the wood-gatherer clearly showed how the absence of a physical reminder can easily lead a person into sin. Out of immense mercy for the Israelites, and to prevent them from straying after the desires of their hearts and eyes, God chose to give them a constant, visible reminder [שפתי כהן]. God's ultimate desire is for the Israelites to sanctify their entire bodies through the observance of all His commandments. Because it is difficult for a person to practically fulfill every single requirement at all times, God provided one all-encompassing commandment. Through this single act, the people can remember and commit to fulfilling everything. Consequently, their pure intention to guard themselves from sin is counted for them as if they had physically performed all the deeds [אלשיך].
From a structural standpoint, beginning a legal instruction with such soft phrasing is highly unusual. The primary approach among commentators is that this specific language is generally used to clarify an existing law, follow up on a previous statement, or connect a new instruction to a recent event. In this instance, the gentle opening does more than just connect the new law to the incident of the wood-gatherer. It serves as a vital link, acting as the concluding and comprehensive result of all the events and laws detailed throughout the entire section [רש ר הירש].