ke·ryg·ma noun \kə-ˈrig-mə\
"Kerygma" is a fancy way of saying "the basic Gospel message": the apostolic proclamation of salvation through Jesus Christ.
At the heart of the Church's mission is an unwavering resolve to proclaim the
Gospel, in season and out. All ministry efforts flow from our own personal and living encounter with the truth of this message - the kerygma; these efforts in turn are fueled by a focused zeal to bring others to experience the same living encounter. It's a message simple enough to teach three-year-olds and profoundly rich enough to overwhelm geniuses.
Of course, in my actual experience of sharing the Gospel, there's usually a more spontaneous and personal quality to it:
"I realize now that Jesus Christ is real, truly risen, and he loves me and died for my sins. More than this, he revealed to me the heavenly Father and now offers me a share in his own divine Sonship. In other words, God loves me so much that he not only forgives me, he wants to adopt me!"