Is there a preference for a person to tie the tzitzit to the garment himself because a mitzvah is greater when performed personally than through an agent?

This source-based Torah study examines the question: Is there a preference for a person to tie the tzitzit to the garment himself because a mitzvah is greater when performed personally than through an agent? The canonical Hebrew discussion develops the issue through the weekly Torah portion and the sources cited there, preserving the distinctions, tensions, and practical implications of the original text. This localized discovery layer does not add any new halakhic, medical, legal, scientific, historical, theological, or empirical ruling or claim beyond the canonical Hebrew source.