The core of original sin, then is LOT - Lack of Trust. Or, it could be considered an innate inability to adequately value ourselves. Label it a 'negative self-image,' but do not say that the central core of the human soul is wickedness. ... positive Christianity does not hold to human depravity, but to human inability.
Robert H. Schuller... the core of sin is a lack of self-esteem. ... Sin is psychological self-abuse. ... the most serious sin is one that causes me to say, 'I am unworthy. I may have no claim to divine sonship if you examine me at my worst.' For once a person believes he is an 'unworthy sinner,' it is doubtful if he can really honestly accept the saving grace God offers in Jesus Christ.
Robert H. Schuller