Covenant and Sign

"This is your covenant which you must keep between myself and you and your descendants after you: everyone of your males must be circumcised." (Genesis 17: 10)

Circumcision is the sign of the old covenant. This is a visible indelible mark. The Eucharist is the sign of the new covenant. It is also a visible concrete sign. Genesis 17:10 reminds me that I am covenanted to God.