"And if Allah should touch you with adversity, there is no remover of it except Him; and if He intends for you good, then there is no repeller of His bounty. He causes it to reach whom He wills of His servants. And He is the Forgiving, the Merciful". (Qur'an 10 : 107)

اللهم لا مانع لما أعطيت، ولا معطي لما منعت، ولا ينفع ذا الجد منك الجد‏"‏

O Allah! None can deny that which You bestow and none can bestow that which You hold back; and the greatness of the great will be of no avail to them against You).(al-Bukhari/ Muslim)

The above mentioned verse is a definite statement about the authority and control of Allah over everything in the universe. We must reflect upon these verses and always pray to Allah for His grace. Only Allah has the power to do good or to harm anyone and no one can change or interfere His plan. It's sheer vain to supplicate to or call upon any other entity?

First we need to understand whatever good or bad happens to us, it cannot happen by the will of Allah so as to increase our rewards in both the condition as stated in below hadith.

Wondrous is the affair of the believer for there is good for him in every matter and this is not the case with anyone except the believer. If he is happy, then he thanks Allah and thus there is good for him. If he is harmed, then he shows patience and thus there is good for him. (Source: Muslim)

The belief that Allah can bestow upon us anything, it certainly boosts our Imaan in every situation we are in. As maintaining our imaan in this world IS VERY DIFFICULT. Until and unless the belief is settled in our heart and have an impact powerful enough to bring about a dynamic change in our thoughts, morals and actions, then definitely it can dictate our inner person. And this phenomenon is not going to happen in a day, month, or even a year. No! This is going to take so many years or may be an entire lifetime. Invoke Allah in fear and hope, should have a good assumption of Him.

Moderation (between hope and fear) is the epitome of steadfastness. It is often said that the servant should possess both fear and hope like the two wings of a bird, if one of the wings were missing, the bird would be unable to fly.

Adversity could be of many kinds like disease, poverty, mishap or any trauma or difficult situations. These moments we really lose our faith or get inclined towards unislamic ways to find the solution. That's the time to revive and remind ourselves that it is test of Allah. Strongly hold on to Allah's rope through constant duaa and His Qur'an. Do fight with our nafs to be steadfast and more determined to face the challenges of life because we all are struggling soul.

Similarly, we all need to train our nafs. And nothing can help us here more than the word of Allah. Be close to Quran. Seek consolation from His words. Let his words hit you, again and again.

Conversely, if Allah Grants any goodness no one can take away from us like guidance, wealth, prosperity and good health and so on. We should have full trust in Allah. Faith negates all kinds of false deities and holds us to the straight path. We adopt unsound principles of conduct, a way that will lead us to our true salvation and happiness.

In both situations we should beg only Allah for everything. Allah is the one who answers the dua of those who beseech Him and place their hopes in Him. He relieves those who seek refuge in Him and He placates their fears. Allah alone is the one to whom all prayers and duas are to be made.

"Our Lord! Let not our hearts deviate (from the truth) after You have guided us, and grant us mercy from You. Truly, You are the Bestower.”(Surat ‘Ali `Imran3:8)