Anxiety is another thing which frequently troubles the heart. We find in the Qur’an:
Say, “The affair belongs entirely to Allah.” (3:154)
This clearly shows us the nature of anxiety, revealing it to be, like ingratitude, a matter of ignorance. The difference between the two is that ingratitude is ignorance combined with fear. The fear of things somehow going wrong or not getting what you need. This is ignorance because the truth is that “The affair belongs entirely to Allah” and the believers know that it is not in the nature of their Lord to let them down: “Allah would not let your belief go to waste. Allah is All-Gentle, Most Merciful to mankind.” (2:143)
Anxiety comes from not really believing that Allah is in control of existence, from lack of trust in Allah, from lack of true knowledge of Divine Unity. It frequently manifests itself as anxiety about provision, as fear that we will not get what we need to feed, clothe and house ourselves adequately, so that anxiety about employment or lack of it, about income or shortage of it, is what in fact occupies most people’s hearts and minds and cuts them off from the possibility of active awareness of the presence of Allah.