For this reason...
For this reason, the prophets, who revealed the Divine commands and restrained people from sin and immorality, must, according to this be endowed with the greatest, most admirable qualities, and be free from every kind of sin and indecency, even error and mistakes, so that people's confidence and faith in them be greater and they may accept their guidance and what they say, and so that people may strive more assiduously in carrying out the plans and practice the reformative instructions of the prophets, and trust from the depths of their hearts their leadership.
Thus the aim of the prophetic mission, that is to say the leading of people from darkness to light would be accomplished; the aim of the prophetic mission would not be obtained under any other circumstances, and that would be very far from the wisdom of God.
This purity and worthiness of the prophets was so extraordinary that people became devoted to them to such a degree that their followers felt great love towards them and gave up their lives in following and obeying them, without heed for the consequences. How can a man be completely free from sin and error? The following will answer this question. How can a man be ma'sum, (infallible)? 1.
Real Love of God The holy prophets were deeply devoted to the Merciful Lord, God, and why should they not have been? They, who with their seeing and hearing and profound insight knew God better them anyone, who understood His greatness, glory and majesty to be above all things, who found Him alone worthy of love, honour and obedience, who had nothing in view but to please Him, who gave their hearts to none but Him, who did everything with devotion to Him, and who knew who were they worshipping.
It was for this very reason that the prophets welcomed difficulties and formidable situations, and also paid attention to God with smiling, open faces even when they were in the most critical circumstances. And so, when, in their beloved, true way, they met with difficulties, they became overflowing with joy. History has recorded the endeavour of these heavenly, torch-bearing men of guidance as also the condemnable behaviour of people towards them.
Could steadfastness in these difficulties have had another motivation apart from love of God and obedience to His commands? Certainly it did not have other motives.