VATICAN CITY (CNS) – To serve God, Christians must learn to be at the service of all and not be dominated by a desire to exert power and authority over others, Pope Francis said.

In his teaching, Jesus made it clear that “he who commands must become like one who serves,” the pope said Nov. 8 in his homily during Mass at the Domus Sanctae Marthae.

“This desire for power is not the path to becoming a servant of the Lord,” the pope said. “On the contrary, it is an obstacle; it is one of these obstacles that we have prayed to the Lord to keep far from us.”

Reflecting on the theme of service, the pope said that another major obstacle that impedes Christians from serving the Lord freely is disloyalty.

Disloyalty occurs, he said, when “someone wants to serve the Lord but also wants to serve other things that are not the Lord.”

“To be disloyal means to play both sides: to play to the right and to the left, to play to God and also to play to the world. This is an obstacle,” the pope said. “He who desires power is the one who is disloyal; he can hardly serve and become a free servant of the Lord.”

Those who succumb to the desire for power and disloyalty, he added, are robbed of peace and “always anxious,” eventually giving in to “worldly vanity and living for appearances.”