VATICAN CITY — Pope Benedict XVI said Wednesday in his first encyclical that the Roman Catholic Church has no desire to govern states or set public policy, but can't remain silent when its charity is needed to ease suffering around the world.

In the long-awaited document "God is Love," Benedict explores the relationship between God's love for mankind and the church's works of charity, saying the two are intrinsically linked and the foundation of the Christian faith.

The 71-page encyclical, eagerly watched for clues about Benedict's major concerns, characterizes his early pontificate as one in which he seeks to return to the basics of Christianity with a relatively uncontroversial meditation on love and the need for greater works of charity in an unjust world.

Even Vatican officials have expressed some surprise at the topic, considering Benedict was the Vatican's chief doctrinal watchdog and could easily have delved into a more problematic issue such as bioethics in his first authoritative text.

In the encyclical, Benedict said the church's work caring for widows, the sick and orphans was as much a part of its mission as celebrating the sacraments and spreading the Gospels. However, he stressed that the church's charity workers must never use their work to proselytize or push a particular political ideology.

"Love is free; it is not practiced as a way of achieving other ends," he wrote.

"Those who practice charity in the church's name will never seek to impose the church's faith upon others. They realize that a pure and generous love is the best witness to the God in whom we believe and by whom we are driven to love."