The Father, The Son, and The Holy Spirit

In Catholic theology, we understand the persons of the Blessed Trinity subsisting within the inner life of God to be truly distinct relationally, but not as a matter of essence, or nature. Each of the three persons in the godhead possesses the same eternal and infinite divine nature; thus, they are the one, true God in essence or nature, not “three Gods.” Yet, they are truly distinct in their relations to each other.

In one sense we can understand this, and in another it will always have an element of mystery. That's okay. Faith by it's nature is composed of things we know, and things that are now, and will always be a mystery. Hebrews 11:1 defines this as: "Now faith is the substance of things hoped for and the evidence of things not seen." We will never have all of the answers. If we did then we would be God. Faith is, in a sense, born if the hope for things unproveable and both are created through the generative power of Love, which is the nature of God.