The Gospel of Mark includes a series of passages that depict direct interaction between Jesus and God. When viewed in their full literary, historical and canonical contexts, these passages can be seen to address an embryonic trinitarian question concerning the relationship between trusting and worshipping Jesus and trusting and worshipping the one God of Israel. They provide grounds for affirming that mutual love, knowledge and communication have a place in the immanent life of the Trinity, and that these elements bear a meaningful analogical relationship to the love, knowledge and communication that ideally characterise human father–son relations.