Deus Caritas Est
"God is love, and he who abides in love abides in God,and God abides in him"
Saint John also offers a kind of summary of the Christian life:
"We have come to know and to believe in the love God has for us".
Being Christian is not the result of an ethical choice or a lofty idea,
but the encounter with an event,a person,
which gives life a new horizon and a decisive direction....
Full encylical - Deus Caritas Est -Pope Benedict vatican.va