In the theology of Father Dumitru Stăniloae, cosmology is presented as a mean of communication of God’s goodness, the creation being the opera of the Trinitarian communion, the gift of the Divine Word, but also a guide to Divine Word through its rationality. The rationality of creation is seen as way of our dialogue with God, which mediate communion. Analysing the ecological dimension of communication and communion, I emphasized that we can speak about a cosmic and an universal communication between all the elements of visible and invisible world. Therefore, there is a solidarity of human being with nature, but also a great responsibility towards creation as a gift of God.