Shenei Luchot HaBerit
The word אורה is understood to refer to the spiritual illumination provided by Torah; the word שמחה to יום טוב, a holiday; the word ששון to circumcision, whereas the word ויקר is a reference to the phylacteries. The scriptural proof for the latter statement is derived from Deut. 28,10: "All mankind will see that the name of the Lord is on you and they will be in awe of you." Rabbi Eliezer the Great said that this is a reference to the phylacteries worn on the head.