The sacraments are a means of salvation that fit our nature. We are creatures made of body and soul, and everything that we know and experience of the world happens through our bodily nature. So God in his wisdom and kindness created a means of salvation that suits us.
Christ took on our physical nature in the Incarnation, which we celebrate during the Christmas season. And he left us the sacraments as a means of saving us that was fitting.
Just as our bodies our nourished through physical means, The sacraments are a tangible means of nourishing our soul in a way that makes sense to us and that we can grasp.
But there’s an even greater meaning to the idea of a sacrament.
In ancient Rome, the sacramentum was a legal oath or pledge that pertained to the military in particular. The sacramentum was an oath that bound you in service to another.
This is another aspect of the 7 sacraments as vehicles of God’s grace.
God himself is not bound by the sacraments (obviously) because God is omnipotent, but he has promised his grace through the sacraments so that we can be completely assured that God gives us his grace through the faithful reception of the sacraments.
Therefore we can say that God has bound his grace to us through his sacraments.
The sacraments instituted by Christ are the only sacraments in the proper sense - these are the actual means of our salvation that communicate grace to us today.
But the Brown Scapular can also be seen as a type of sacrament as well - Mary’s Sacrament.
This is because it is a visible sign that daily reminds us of her constant protection and intercession. And through our devotion to the Brown Scapular, Our Lady binds herself to us and guarantees to secure us the grace necessary for our salvation.
In other words, the Brown Scapular is too important a devotion to ignore.