Final answer:
Christians give evidence of their belief in Jesus by engaging in good works, participating in religious sacraments like baptism and the Eucharist, and some may lead cloistered monastic lives. Art, rituals, and a historically grounded emphasis on compassion and universal love are central to Christian practices.
Step-by-step explanation:
Christians can give evidence of their belief in Jesus through several practices. They engage in charitable works, such as creating inspirational works of art, akin to the frescoes by Giotto in the Arena Chapel. Moreover, Christians partake in religious rituals and sacraments, such as baptism and the Eucharist. The latter is a central act of worship during which they consume bread and wine as symbols recalling Christ's sacrifice.
In addition to these practices, Christians may live a monastic life. Devout men and women sometimes choose to become nuns or monks, separating themselves from societal life to focus on prayer and devotion in a cloistered setting. There also exist nontrinitarian Christians whose beliefs differ slightly but still center around the teachings of Jesus.
Historically, Christians have been unified by the spiritual teachings and life of Jesus, as recorded in the New Testament Gospels. The example set by Jesus and his apostles, particularly their emphasis on compassion and universal love, continues to be a guiding principle for Christian conduct today.