The apostle John was privileged to see the reason for this restraint in a revelation given to him by Jesus.
وَفِي ٱلْوَقْتِ ٱلْحَاضِرِ ،‏ تَمْنَعُ قُوًى سَمَاوِيَّةٌ لَا تَرَاهَا ٱلْأَعْيُنُ ٱلْبَشَرِيَّةُ ٱنْدِلَاعَ ذلِكَ ٱلضِّيقِ ٱلْعَظِيمِ .‏