Dua (Sh Abdul Aziz on Deenport)

A cool document from Deenport, authored by Sh Abdul Aziz Ahmad:

My favorite part from it:

Certainty that the prayer will be answered
One should pray with attention and certainty in your heart that Allah – Exalted be He - will answer you supplication. The Messenger, upon him be peace said:

"ادْعُوا اللَّهَ وَأنْتُمْ مُوقِنُونَ بالإِجابَةِ، وَاعْلَمُوا أنَّ اللَّه تَعالى لا يَسْتَجِيبُ دُعاءَ مِنْ قَلْبٍ غافِ لٍ
لاهٍ"
Call on Allah with certainty of an answer and know that Allah the Exalted will not answer the supplication from a heart that is inattentive and oblivious.
(al-Tirmidhi on the authority of Abu Huraira)