[18].Surah Al-Kahf [The Cave]: Ayat 103-105

Ayat 103. Say (O Muhammad ): "Shall We tell you the greatest losers in respect of (their) deeds?

Ayat 104. "Those whose efforts have been wasted in this life while they thought that they were acquiring good by their deeds!

Ayat 105. "They are those who deny the Ayât (proofs, evidences, verses, lessons, signs, revelations, etc.) of their Lord and the Meeting with Him (in the Hereafter). So their works are in vain, and on the Day of Resurrection, We shall not give them any weight.

[Tafseer] That is, those who prided themselves on their works in this life, and now find that those works are of no avail. Their loss is all the greater because they had a misplaced confidence in their own deeds or in the assistance of false "protectors". Allah is the only Protector: no one else's protection is of any use. Many people have such a smug sense of self-righteousness that while they go on doing wrong, they think that they are acquiring merit. So, in charity, all the elements that make for outward show or selfishness (as to get some worldly advantage) nullify the deed of charity. In the same way, hypocrites sometimes affect to be surprised that their declared effort for somebody's good is not appreciated, when they are really seeking some hidden gain or false glory for themselves. The sincere are only those who believe in their spiritual responsibility and act in Allah's sight. What weight can be attached to works behind which the motives are not pure, or are positively evil? They are either wasted or count against those who seek to pass them off as meritorious!

Hazrat Abu Hurairah (May Allah be pleased with him) reported: The Messenger of Allah [SAWW](PBUH) said, "On the Day of Resurrection, there will be brought forth a bulky person whose value to Allah will be less than that of the wing of a mosquito".

[Al-Bukhari Book 06, Chapter 60, Hadith # 253]. 

Lesson : as mentioned above in Surah Al-Kahf Ayat 105."on the Day of Resurrection, We shall not give them any weight" This Hadith means that manifestation of power and splendour, which are considered so important for people in this world, will be of no value to Allah. In the Hereafter, Allah will judge a person by his Faith, devotion and piety. It is, therefore, essential that one should concentrate on the reformation of his own heart and mind.