לא תזבח לד' אלקיך שור ושה אשר יהיה בו מום
The animal that is brought up as an offering to Hashem must be without blemish. Chazal (Sifri) detail a variety of disqualifications which invalidate a sacrifice. The shoresh, root, of this mitzvah is quite understandable. A person who brings a korban, sacrifice, is to focus his thoughts towards Hashem. A human being is affected by the strength of his actions. Hence, it is only proper that the sacrifice he offers be without blemish. This reflects the idea that the intentions of a man neither rest – nor become focused – upon a lesser sacrifice as they would upon a more…