This is a lesson about liturgy, sacraments, and the importance of signs and symbols within faith practices. The lesson emphasizes the reciprocal nature of blessings, where God blesses man, and man blesses God in return, particularly in the context of liturgical practices. It defines sacraments as efficacious signs instituted by Christ and entrusted to the Church, meant to dispense divine life and grace. The lesson further highlights the importance of the liturgical year, weekly rhythms, and the daily practice of the Liturgy of the Hours in fostering a deeper connection with God.