Therefore O Muslims, leave the mindset of kuffar’s that the future will be better. You can work for it, that’s not a problem, you can hope for it, that’s you can live for but don’t get deluded with those hopes as you have heard it from CERTAIN source, “the following day will be the worse of what it is today”

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Narrated Az-Zubair bin `Adi:

We went to Anas bin Malik and complained about the wrong we were suffering at the hand of Al- Hajjaj. Anas bin Malik said,

“Be patient till you meet your Lord, for no time will come upon you but the time following it will be worse than it. I heard that from the Prophet.”

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حَدَّثَنَا مُحَمَّدُ بْنُ يُوسُفَ، حَدَّثَنَا سُفْيَانُ، عَنِ الزُّبَيْرِ بْنِ عَدِيٍّ، قَالَ أَتَيْنَا أَنَسَ بْنَ مَالِكٍ فَشَكَوْنَا إِلَيْهِ مَا نَلْقَى مِنَ الْحَجَّاجِ فَقَالَ ‏

‏ اصْبِرُوا، فَإِنَّهُ لاَ يَأْتِي عَلَيْكُمْ زَمَانٌ إِلاَّ الَّذِي بَعْدَهُ شَرٌّ مِنْهُ، حَتَّى تَلْقَوْا رَبَّكُمْ ‏”

‏‏‏ سَمِعْتُهُ مِنْ نَبِيِّكُمْ صلى الله عليه وسلم‏‏

Sahih al-Bukhari 7068
In-book : Book 92, Hadith 19
USC-MSA web (English) : Vol. 9, Book 88, Hadith 188 (deprecated)