Father, Son and Holy Spirit

In the Trinity the Father, Son, and Holy Spirit are exactly the same in every way, except for Their origins. If the Father is good and loving then of course the Son and Holy Spirit are too. But the distinction is that the Father has no cause. He simply is. The Son is eternally born from the Father, and the Spirit eternally proceeds from the Father. These three modes of origin distinguish Them as Persons.

source:

http://orthochristian.com/94295.html