وَٱلَّذِينَ يَصِلُونَ مَآ أَمَرَ ٱللَّهُ بِهِۦٓ أَن يُوصَلَ وَيَخْشَوْنَ رَبَّهُمْ وَيَخَافُونَ سُوٓءَ ٱلْحِسَابِ
Commentary:
This verse contains a few more signs of "the men of understanding" mentioned in v. 20. After fulfilling their covenant with God and establishing a true and real connection with Him, they turn to His creatures and form a true connection with them also, in the manner and to the extent prescribed by God. Thus, after faithfully discharging their duties to God, they fulfil the obligations they owe to His creatures; and for the performance of this double duty and the fulfilment of the twofold covenant, they make use of the means created by Him.
The expression, fear their Lord, means that after having established a true relationship with God and man, they are ever on their guard lest it should be broken through negligence on their part.
The verse thus embodies another sign of "the men of understanding." Whereas, on the one hand, they are watchful and anxious lest they should be deprived of the nearness of God after they have once attained it, on the other, they fear lest they should incur the displeasure of God by showing laxity in the performance of their duty to their fellow beings. See also 2:28.
After faithfully discharging their duties to God, the believers fulfil the obligations they owe to His creatures. The observance of these two duties constitutes the basis on which the whole fabric of religion stands.