Shaikh Haji Shakeel Ahmad (Allah preserve him) said,

‘Keep the heart attentive towards Allah all the time.

Outwardly it appears that the pious people (ahl-Allah) are just sitting idle. That is not the case at all. There is no heedlessness (gaflah) for them. They are totally engrossed in the remembrance of Allah. Although their tongue is silent but their heart is drowned in the remembrance of Allah.

In contrast we have prayer-beads (tasbih) in our hand and repetition of dhikr formulas on our tongue but our hearts is totally inattentive and drowned in heedlessness.’

Madinah e munawarrah, 3rd Muharram 1434/17th November 2012, after asr