Appointing a mohel and humility
זאת בריתי אשר תשמרו ביני וביניכם ובין זרעך אחריך המול לכם כל-זכר
This is my covenant that you are to observe between Me and you and your offspring that follow you: circumcise all boys
The Torah places a mitzvah on the father to give his son a bris milah. However, very often is the case that the father doesn’t know how, and he appoints a mohel to do the mitzvah for him. Seemingly, the mohel is acting as the father’s shliach, his agent. Some even explicitly appoint the mohel as their shliach. However, this isn’t so simple. Some are of the opinion that a person who can perform milah themself isn’t allowed to appoint another to do it for them. Seemingly, they hold that shlichus, agency, doesn’t work for the mitzvah of milah. Where do they know this from?