Also starting at 1st level, your healing spells are more effective. Whenever you use a spell of 1st level or higher to restore hit points to a creature, the creature regains additional hit points equal to 2 + the spell’s level.
And the Blessed Healer feature at 6th level:
Beginning at 6th level, the healing spells you cast on others heal you as well. When you cast a spell of 1st level or higher that restores hit points to a creature other than you, you regain hit points equal to 2 + the spell’s level.
Suppose I, a life cleric with a Wisdom modifier of +3, cast Mass Healing Word at 3rd level, which heals 1d4+3 hit points to multiple creatures. If I include both myself and another creature as targets of the spell, how many hit points would I heal? Would I gain the benefits from both Disciple of Life and Blessed Healer?