The pasuk says "גדילים תעשה לך" - Make "Gedilim [i.e. Tzitzis] for yourself.
Rav Simcha Bunim expounded: Zolst in dir areinmachen a groiskeit. Nicht tzu zein by zich gefalen. [He said it in Italian. I translated into Yiddish]. You have to make yourself great. Not to think lowly of yourself. Make yourself a Gadol.
This lesson is taught by the mitzva of Tzitzis b/c when one wears the uniform of [let us say] the LA Lakers he feels VERY CHASHUV [particularly if he is really a Laker]. A fortiori [קל וחומר] when one wears the special uniform of a male Jew he should feel INCREDIBLY chashuv! Hashem chose YOU for the special task of keeping the 613 mitzvos alluded to by the Tzitzis and spreading His Light to the world.
