Jesus used physical signs to convey His love and He is still using physical signs today to communicate his love in the signs of love that the Catholic Church calls the sacraments. The seven sacraments are:

The Church, in thinking of the origin of the sacraments, discovered its special vocation: Just as at one time Jesus had used his physical body to carry out the Father’s mission, so now he would use as instruments of salvation the human members of his Church. In this way, the risen Lord would be able to do this in an especially direct and tangible way through these seven specialized rituals: the sacraments of the Catholic Church.

Source: JOF