I do not say this as a cliché, but as a simple statement of fact.
I am also a Catholic Christian. I have been baptized into the death and resurrection of Jesus Christ, renewed by the Holy Spirit, and made a new person in Christ, a child of God, an heir to eternal life. I have been restored by Christ through the Sacrament of Penance and Reconciliation for those times when I rebelled against my loving Father and went my own way, only to see my proud illusory schemes dissolve into disappointment and misery. I continue to be sustained and nourished in this new life in the Spirit - this supernatural life of grace, of adopted sonship, of belonging to God - by the enduring offering and “substantial presence” of the crucified and risen Jesus who gives himself to me as food and drink in the Eucharist. Christ vivifies me; he is the life of my life.
I have learned that by trying to ignore God's creating and redeeming love and his radical outpouring of himself, his giving of himself for me, I do violence to the very foundation of my own person. Adhering to him is the only way I can be true to myself.
I don't trust my own ideas or my own power. I trust in Jesus Christ.
Still, I am a sinner.
There are those sins the Catholic tradition calls "venial sins" which hinder and perhaps even cripple but do not break off our relationship with God.
My daily life is full of these "slight" sins: the facade that I think of as "myself" is largely a construction of vanity, of "benevolent" intrigue, fibbery, excessive love of comfort, the desire to please people, laziness, coldness, negligence and evasion, sharp-edged words, impatience, complaining, sentimentalism, distraction, and - of course - that ill-governed curiosity about events and people into which rash judgment and gossip inevitably creep, wearing a thousand conceptual disguises.😑 I'm not complacent about all of this. These sins injure me as a person and injure others. They are hindrances to the fullness of union with God, and sooner or later they will have to be cleansed away by the Refiner's fire, Love's fire.
I struggle against these sins; I want to grow in love and to do God's will, but part of me is pulled in the direction of trying to cut some kind of a deal with him.
It's easy for me to forget that he's the Infinite Lover who makes me and sustains me, who first gives me myself and then gives me himself. A worldly image seeps through the corners of my mind and tries to distort the reality of God, painting him as just a "big power" in the universe who confronts me "from the outside" with some (more or less arbitrary) prohibitions and demands. My diplomatic temperament inclines me to negotiate, as though the ultimate meaning of life is to save one's own skin. I do not believe this, but I recognize it as part of a toxic atmosphere around me that can stir up what remains in me of the effects of the original lack-of-trust (i.e. “original sin”) that afflicts humanity.
It's not surprising that serious Christians (far more serious and dedicated than me) still commit many "venial" sins. So much of this behavior is rooted and woven within our complex, partly inscrutable subconscious dispositions. They divert and obscure our understanding and our freedom so that we stumble along the path of life, or we hesitate, we dither, we are distracted, anxious, forgetful. In our daily actions and evasions, we fall short or fail to follow our vocation to love.
These frequent failures are “small” and/or inadequately deliberated or mistakenly perceived by our weak and afflicted minds. They are “venial sins” (according to the terminology of classical moral theology) that aren't sufficient to constitute a willful rupture in our relationship with God, but that deserve some measure of blame. They do not lead us closer to the perfect happiness for which God has created us. They obscure somewhat our focus on true happiness. They drain our spiritual strength and make us more vulnerable to greater temptations, and more divisive toward one another..
I am a sinner. I don't know myself. I cannot find complacency just by looking at myself. My sins may be far greater than I imagine, far more dangerous and destructive than I think. "Who can detect trespasses? From my secret sins deliver me, O Lord" (Psalm 19:12). I am a sinner who stands before God in need of his mercy. I recall the venerable words of the ancient prayer: Lord Jesus Christ, Son of God, have mercy on me, a sinner.
We are all sinners, but the love of God has been revealed to us. This is the foundation of our confidence and our joy. We pray to the God who has poured out his love for us in Jesus, with confidence in the power, wisdom, and mysterious fruitfulness of this love. We struggle with our still-somewhat-distorted inclinations, and we repent of our sins and endeavor to make amends while growing in the knowledge and love of God. We do the best we can with what God entrusts to us, using our understanding, freedom, and energy to adhere to him in a cooperation with his grace that shines light on our fragility, our total dependence on him, and the wondrous power of his love to transform us. Then, beyond the horizon of our own limitations, we abandon ourselves to his infinite mercy.
We find confidence in God and a living hope for eternal life when we live and grow in this relationship with him. "Do not be afraid," Jesus says. The abundance of God's love is greater than our sins. Indeed, his love is greater than anything in us. Even the sanctity that we share in, the supernatural heroism that he empowers us to achieve in union with him, doesn't measure the "size" or the "limits" of his mercy.