Hadith: Look at those who are below you, and do not look at those who are above you, for that is more likely to hold you back from belittling the blessings that Allah has bestowed upon you

عن أبي هريرة رضي الله عنه عن النبي صلى الله عليه وسلم قال: «انظروا إلى من هو أسفل منكم، ولا تنظروا إلى من هو فوقكم، فهو أجدر أن لا تَزْدَرُوا نعمة الله عليكم».
[صحيح] - [متفق عليه، وهذا لفظ مسلم]

Abu Hurayrah (may Allah be pleased with him) reported that the Prophet (may Allah's peace and blessings be upon him) said: "Look at those who are below you, and do not look at those who are above you, for that is more likely to hold you back from belittling the blessings that Allah has bestowed upon you."
[Authentic hadith] - [Al-Bukhari and Muslim. This is the wording of Muslim]

Explanation

This Hadīth provides a beneficial and comprehensive advice that explains the methodology every Muslim should follow in his life. If people apply this advice, they will enjoy a life full of patience, gratitude, and content. The advice in the Hadīth has two parts: 1. One should look at those who are at a lower level than him regarding worldly affairs. 2. One should not look at those who are above him regarding worldly affairs. When anyone does so, he will enjoy tranquility, peacefulness, and a good life as he will always recognize the blessings of Allah, the Almighty, upon him, for which he will show thankfulness and humbleness. Of course, this Hadīth speaks about worldly affairs in specific, because one should always look at those who are above him when it comes to the affairs related to the Hereafter. This will urge him to follow their example, and try to do more acts of obedience as he comes to know his negligence in comparison to their diligence.