Normally, during the month of Ramadhaan, we get the fervour to do ‘ibaadat, but thereafter it ceases. Hence, Allah Ta‘ala speaks of istiqaamat. Istiqaamat is normally translated as steadfastness, but the closest translation would be ‘commitment’. Commitment will mean that at any given time one has the thought and concern of that particular thing in his mind.
In proportion to one’s commitment, Allah Ta‘ala opens out avenues and ways. A person shows commitment to his wife whose favours are limited and likewise the enjoyment received from her is also limited. So how much more shouldn’t one be committed to Allah Ta‘ala whose favours are unlimited and the enjoyment that He will bestow will also be unlimited.