Forgetfulness
"And when some hurt touches man, he cries to his Lord (Allah Alone), turning to Him in repentance. But when He bestows a favor upon him from Himself, he forgets that for which he cried for before, and he sets up rivals to Allah, in order to mislead others from his path. Say: Take pleasure in your disbelief for a while: surely, you are (one) of the dwellers of the Fire!"(Qur'an: Translation of the meaning, 39:8)
"When harm touches man, he calls Us (for help); then when We have (rescued him from that harm and ) changed it into a favor from Us, he says: "Only because of knowledge (that I posses) I obtained it." Nay, it is only a trial, but most of them know not!"
(Qur'an: Translation of the meaning, 39:49)
" And indeed We made a covenant with Adam before, but he forgot, and We found on his part no firm will-power."
(Qur'an:Translation of the meaning, 20:115)
Man was created forgetful so that he can forget the sufferings and troubles he may encounter in his life, otherwise life would be intolerable. But if one forgets his commitment to Allah, to worship Him in the best manner, it is then a disaster. Allah ordained that he should be worshipped by people and jinns, without any partner to Him. Allah also took the convenant of the people of the scripture to teach one another such a duty toward Allah. Man forgets suffering by the Mercy of Allah, but one should not forget the responsibility to worship Allah and thank Him for every good event or grace. One should not forget resorting to Allah in disasters as one should thank resorting to Allah at disasters as one should thank Allah for any grace. Though, it is man's nature to forget, intended forgetfulness is not a quality of the pious people.
"And (remember) when your Lord brought forth from the Children of Adam, from their loins, their seed (or from Adam's loins his offspring ) and make them testify as to themselves (saying): "Am I not your Lord?" They said: "Yes! We testify," lest you should say on the Day of Resurrection: "Verily, we have been unaware of this." (Qur'an: Translation of the meaning, 7:172)
"(And remember) when Allah took a covenant from those who were given the Scripture (Jews and Christians) to make it (the news of the coming of Prophet Muhammad and the religious knowledge) known and clear to mankind, and not to hide it, but they threw it away behind their backs, and purchased with it some miserable gain! And indeed the worst is that which they bought."
(Qur'an: Translation of the meaning, 3:187)
Whoever thinks that he gains by his own attempts and knowledge is wrong, one should not forget Allah in any grace or pleasure he realizes. Gratitude is due to only Allah. The more grace Allah bestows upon one, the more forgetful one becomes to thank Allah. One cannot avoid forgetfulness altogether, and a little forgetfulness is allowed as Adam our father forgot and was been forgiven. So limited forgetfulness is not allowed, though Allah forgives if one repents.
