Genuine excuses excuse the genuinely accidental and unintentional.
For everything volitional there is forgiveness, which is restitution to the status quo ante of the relationship even though a wrongful act has been committed. That's the divine forgiveness that fills in the gap that excuses are too thin to cover.
And this is where the psychological explanations for anything I do are actually a moral evasion.
The truth behind all truths is this: my psychological difficulties (fretting, worry, nagging pre-occupations like stones in my shoe, the pall of gloom that hangs like a shroud over my circumstances) are really moral difficulties:
I've been given, by God, a way to be, believe, think, act, and live that frees me from all of that, if only I will make myself small enough, in fact nothing enough, to let God fill my consciousness, but I have rejected that in favour of my own self-defined existence, with which come all of the 'pinions about how things should be and the resultant unhappiness: I've eaten from the tree of the knowledge of good and evil, and now I 'know' things, and the things I 'know' are making me unhappy; but, rather than making my way back to God by repenting, I would rather remain unhappy if it involves retaining my self-concept.
That's what needs to be forgiven.