Presence at Church is essential to having a strong faith.
Presence can be both physical, mental, and spiritual.
The physical side to presence is attendance at Mass. the mental aspect is thinking about God and one's faith. The spiritual part to presence is the inclination at Church and the activity in the community. Ex. Singing at Mass or Community service.
As Catholics, we worship God at Church because we believe that he is really there and his presence is real (Eucharist).
God shows is presence to us outside of Chirch as well. We see him in literature, other people and in nature.
The Church presents Christ in two ways: Through the Word and through the sacraments.