Jesus reminded his disciples about the need to develop what essential quality? The need for strong faith was another topic that Jesus often discussed with his disciples.
وَٱلْحَاجَةُ إِلَى ٱمْتِلَاكِ إِيمَانٍ قَوِيٍّ هِيَ مَوْضُوعٌ آخَرُ غَالِبًا مَا نَاقَشَهُ يَسُوعُ مَعَ تَلَامِيذِهِ .‏