Ibn Al Qayyim (RA) in his book Al-Waabil Al Sayyib writes:
“When it comes to prayer, people are of five levels:
The first is the level of the one who wrongs himself and is negligent. He does not do wudoo’ properly, or pray at the right time or make sure he does all the necessary parts of prayer.
The second is one who observes the outward essentials of prayer, prays on time and does wudoo’, but he has lost the battle against his own self and is overwhelmed with waswaas.
The third is one who observes the outward essentials of prayer, prays on time and does wudoo’, and also strives against his own self and against waswaas, but he is preoccupied with his struggle against his enemy (i.e. the Shaytaan), lest he steal from his prayer, so he is engaged in salaah and jihaad at the same time. (more…)