Dua is the weapon of a believer. It will protect you from the evils of enemies. Dua is the shield of a believer. It will increase your sustenance. Dua is more forceful than a sword. Dua replaces what has been destined and also creates what has not been destined. Dua is a form of ibaadat. Dua removes both the present suffering and that which will come down later. Dua and sufferings challenge each other until the Day of Judgment, and Dua comes out victorious. Dua is so powerful that only Dua and nothing other than Dua itself has the power to create and alter fate!
If Allah’s servant keeps his mouth shut and does not ask anything from Him, nothing will be given to him. Therefore ask Allah SubhanahuwataAla for what you need so that He will give it to you. Whoever knocks on a door persistently will be allowed in. If you keep on knocking on the door of Divine Mercy, sooner or later it will be opened for you.
Never get tired of Dua, for Allah SubhanahuwataAla has attached much value to it. Allah SubhanahuwataAla says "Let My servants know that I have the power to grant My servants’ wishes." If Allah SubhanahuwataAlagrants someone a chance of making Dua, He will not deprive him of an answer. A believer’s Dua will increase his good deeds and rewards him in the Hereafter as his other good deeds are rewarded.
A believer who makes Dua receives one of three things:
1. Either he will quickly have his Dua answered,
2. or he will get in the Hereafter,
3. or something bad will be prevented from him equal to the value of his Dua.
Everything has the proper discipline to it, and so does Dua. Duas are not answered when the requirements of Dua have not been fulfilled. Whoever obeys Allah’s order and offers his Dua properly, will be answered. Praise Allah Almighty. Remember Him and thank Him for His blessings. Send greetings to Rasulullah (Sallallahu alaihi wasallam) . Pray your Salat regularly. Recite Quran regularly. Seek Tauba. Attain Taqwa. That is the right way for Dua. Dua which is not made properly does not even ascend towards Allah.
It may be that you dislike a thing while it is good for you, and it may be that you love a thing while it is evil for you. At such times, refer to He who knows the best, and that is Allah. Allah knows while we do not know. So we must make Dua to Allah, then be patient, have faith in His unquestionable decision, and trust His absolute wisdom. Never have this impression that Allah Almighty has opened the door of making Dua but has closed the door of answering it. Sometimes Allah delays answering the Dua to give a greater reward and a further blessing. What a catastrophe it would be if Allah answered every prayer at the snap of your fingers. Do you know what would happen? Allah would become your servant, not your Master. Suddenly Allah would be working for you, instead of you working for Allah. Remember, Allah's delay is not Allah's denial. Allah's timing is perfect. Patience and trust are needed.
If I were to summarize the whole concept of Dua into one single statement, it would be this:
Dua is a form of Ibaadat, such a powerful Ibaadat that it can create and alter Qismat, and Allah is generous and if His servant raises his hands towards Him, He feels reluctant not to accept it.
Allah knows the best