The person who seeks lessons from the guidance of Allah SWT and is eager to learn and seeks the attention of the one with knowledge is worthy of the purification and the reminder that he is looking for. Whereas those that think themselves self-sufficient and are in less interest towards the reminders from Allah perhaps they do not seek or no not think they need to be and may find some hindrance towards attaining purification. The prophet Muhammad peace be upon him frowned and turned his attention away in such a situation, the admonition from Allah SWT was that these words and knowledge of the Quran are for all types of people whether rich, poor, wealthy or needy these all types require the knowledge and reminders of the Quran.
This revelation of the Quran is a reminder and it is written by noble scribes the angels in honored, revered respected pages, exalted and held in high honour, highly esteemed and these words are purified free from any immorality, deficiency or additions.
Allah SWT mentions how ungrateful and condemned is the disbelieving person they were created from a sperm drop something despised and fashioned into a proper being and ordained their development and he made it easy for them to come out of the mothers womb and they live and then die eventually becoming inhabitants of the grave. And then when Allah wills after the body has been decayed and become bones He SWT will resurrect and resuscitate the person by clothing their bones with flesh and bringing them back to life.
Similar to how a seed in the barren earth when watered it meticulously sprouts and emerges from the earth as vegetation into a new life. The disbelievers refusing to believe in the resurrection simply because they seem to think it is too far-fetched in occurring they fail to comply with being mindful of Allah SWT and remain ungrateful in their lives.
Allah SWT tells people to reflect and consider the food that is provided to them by sending down rain in abundance ot the earth making it revive with green pastures and make the earth meticulously open so that the sprouts or seedlings grow forth through the will of Allah for not every seed sprouts and only by the will of Allah does the earth produce its grain that Allah causes to grow as well as different types of fruits like grapes and other greens in all different forms of vegetation. Just like olives that grow in the blessed trees and dates in the palm trees with dense orchards growing in abundance many kinds of fruits and fodder which are all meant as sustenance for people and their animals.
This cyclical nature of the abundant rain pouring down into the earth and the earth splitting open so that all forms of fruit and vegetables and fodder grows is entirely provided by Allah SWT. Let people reflect on how this means of giving life sustaining provision be a means for being grateful that Allah SWT provides for all living creatures on earth and man has to only seek this provision by working for it.
Allah SWT then tells us about a deafening blast it is the sound of the commencement of the Day of Reckoning when it will be so frightening and the sound for those who are on the earth at the end of times will deafened by it, the people will be fleeing from their own siblings, even from their mother and father and their spouse and children. To clarify this is when the resurrection takes place for on the first deafening blast each soul on the earth at the end of times will perish. And after a time of 40 unknown whether its 40 days, years or divine years the second blast of the trumpet will be sounded that is when humans will be resurrected for the day of Judgement.
On this day every soul will be fleeing from their closest loved ones and each soul will only have concern for only themselves. There will be no relations as every person will be worried and concerned for themselves except whom Allah wills.
This day some of the people their faces will be bright and laughing and rejoicing even though there will still be moments of concern for themselves, these are righteous, obedient believer of Allah and the Day of judgement.
While many other faces will be darkened and dusty with being cast in gloom and fear for these people are those that are the disbelieving sinful, evil, wicked persons who will regret their entire disposition due to the lives they lived as sinners spending, wasting time and effort in immoral and evil ways upon the earth.
The reason they will be cast in gloom and darkness on their faces is entirely a matter of their own making and also this is the decree of Allah that those who are destined for the hellfire will work and play towards entering this terrible abode, because they chose to do so from their own free will.
So the lesson from these words is to seek the guidance of Allah SWT so a person of this humanity does not lose themselves to the abode of the hellfire and strives and struggles their utmost to save themselves and their families from the punishment of Allah and seek to know Allah and strive for the seeking of Allahs pleasure in living correct and proper within the purposes of the shariah that will make a person eventually enter into the gardens of paradise. Save yourself and your family and seek Allahs reward.