الآية رقم (163) - هُمْ دَرَجَاتٌ عِندَ اللّهِ واللّهُ بَصِيرٌ بِمَا يَعْمَلُونَ (163) - {They are [varying] degrees in the sight of Allah, and Allah is Seeing of whatever they do.} So there are degrees in Heaven and not just one.