The Episcopal Book of Common prayer defines sacrament(s) as such:
Sacraments ordained of Christ be not only badges or tokens of Christian men’s profession, but rather they be certain sure witnesses, and effectual signs of grace, and God’s good will towards us, by the which he doth work invisibly in us, and doth not only quicken, but also strengthen and confirm our Faith in him.
The Roman Catholics define sacrament as such:
The fact is sacraments are gifts from God, not from man. God gave them to man and I find it hard to understand how man can take them away. Why would anyone believe that they can take away "God's good will toward us." Why would anyone, correction, any professing Christian want to? We must be very careful about taking on the persona of God. We must not decide who is worthy and who is not worthy of sacraments and grace and God's good will. If we believe that our spiritual health depends on our individual relationship with God and then we place ourselves in God's place, well let me just parrot a line from the Devil's Advocate: "Pride, my favorite sin."