[15].Surah Al-Hjir [The Rocky Tract]: Ayat 97-99

Ayat 97. Indeed, We know that your breast is straitened at what they say.

Ayat 98. So glorify the praises of your Lord and be of those who prostrate themselves (to Him).

Ayat 99. And worship your Lord until there comes unto you the certainty (i.e. death).

Hazrat Al-Mustaurad bin Shaddad (May allah be pleased with him) reported: Messenger of Allah  [SAWW](PBUH) said, "This world (i.e., its pleasures and duration) in comparison with the Hereafter is (similar to the amount of water) one gets when he puts his finger in the sea. Let him then see what it returns with".

[Muslim Book 40, Chapter 14, Hadith # 6843]. 

Lesson : as mentioned above in Surah Al-Hjir Ayat 99. And worship your Lord until there comes unto you the certainty (i.e. death). This Hadith shows the value of the Hereafter and its blessings compared to the worldly life. The proportion between the two is that the former is like an ocean while the latter is like the proportion of water left on one's finger when dipped in the sea!.