The Notes in the NAB version of this Bible state that this verse…:

Psalm 51:7: “True, I was born guilty, a sinner, even as my mother conceived me.”

(Via USCCB.)

…means that in no time was the penitent without sin. This, I think, refers to the Original Sin of Adam and Eve. A sin that we inherited as their descendants, from when they turned away from God at the temptation by Satan under the pretext that they can “be like God” and discern good from evil under the guidance of their own conscience.

What guides and form your conscience? Is it God, through the ministry and teachings of the Catholic Church? Or do you “keep your own conscience” and decide “for yourself” what is moral and right, perhaps depending upon the circumstances? This pretext is a false one, as everyone’s conscience is formed by something. Some people are just honest and humble and readily admit as to what guides their conscience. Others are delusional and feel (rather that think) that they are in control of their moral decision-making.

So, who or what does your thinking for you?

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