That may be difficult at first because sin cost us something we have never yet experienced. Adam and Eve initially enjoyed perfect human life.
وَقَدْ يَبْدُو ذلِكَ صَعْبًا لِلْوَهْلَةِ ٱلْأُولَى لِأَنَّ ٱلْخَطِيَّةَ كَلَّفَتْنَا شَيْئًا لَمْ نَمْلِكْهُ قَطُّ .‏