When Amir-ul-Mu'mineen Ali (as) was in the bed of martyrdom...
When Amir-ul-Mu'mineen Ali (as) was in the bed of martyrdom, as his last testaments to his children, he said: “Verily I heard from your ancestor, the Prophet (S) who said: ‘Reconciliation is better than the kinds of recommended prayer and fasting’.” ^2 Some Islamic traditions indicate that the reward of reconciliation between people is much more than that of the recommended prayer and fasting.
“Verily believers are only those who, when Allah is mentioned, their hearts quake, and when His Signs are recited to them, it increases them in faith, and in their Lord (alone) do they trust.”*** 3 ***. “Those who keep up prayer, and spend (benevolently) out of what We have provided them.”*** The true believers are those who are in owe of Allah (s.w.t) because of His glorification and veneration.
That is, when the speech is delivered upon Allah's justice, retribution, and power, they dread, and when the speech is about His bounties, kindnesses, graces, and rewards, they feel peace in themselves; as the Qur'an says: “... now surely by Allah's remembrance are the hearts set at rest.” (Surah Ar-Ra'd, No. 13, verse 28).
Thus, there is no contrast between these two verses, because fear relates to the remembrance of Allah's retribution and peace, but peace and rest relates to the remembrance of Allah's forgiveness and kindness. Moreover, whenever a believer remembers the Divine bounties and forgiveness of Allah, he obtains a favorable opinion and he rests, but when he remembers his own sins, he becomes inconvenient and anxious.
The verse says: “Verily believers are only those who, when Allah is mention, their hearts quake...” The Arabic term /wajila/ means ‘to fear, apprehend’ which is accompanied with sadness. Then the verse continues saying: “...and when His Signs are recited to them, it increases them in faith...” In that circumstance, their faith and their certainty will be increased.
“...and in their Lord (alone) do they trust.” Such people trust in Allah in any conditions and they rely on Him for the affairs of their lives.