Instead of thanking items for having served me, I thank God. Objects are not alive. Otherwise, Kondo's method is very similar to the Christian way of Simplicity. Most First World Christians don't know about this, even our pastors struggle with too much stuff.
Pope Leo X111, the Pope of the working classes who wrote the classic Rerum Novarum, said:
"Once the demands of necessity and propriety have been met, the rest of what one owns belongs to the poor."
Radical, isn't it? A good starting point. Of course 'necessity' and 'propriety' might be open to wide interpretation, depending on what one is used to.
Do I need my laptop? Yes.
Do I need 20 blank DVDs? No, I will not use them. The reason I have 20 is that I couldn't at the time buy less than that number. I used one or two.
This is how we accumulate needless junk!
Do I need a 2nd Winter Coat? No.