... that a person needs to be in a state of grace
... achieved by His gift of confession
... created by original sin
... real presence of Jesus in the Eucharist

The only assurance you have with any of these teachings is that some guy in a pointy hat "said so." You speak of loving God "in the simplest things" and yet you seem to ignore his two very basic, "simple" commands. In lieu of the simple teachings, you latch on to ancient "doctrines" steeped in Greek and pagan philosophy as if they were the revealed word of God. Can you not see that in showing mercy and compassion to our neighbors (welcoming them to the table, so to speak), that in itself is a (if not "the") most basic expression of "loving God?"