[Lorionasodi]

By the grace of Allah (SWT) we are dealing in this thread with a matter that concerns fine tuning and is a matter of moderation. We are not dealing with an alarming issue. Personally I feel that matters relates to both Deeni as well as worldly knowledge.

Regarding secular knowledge - let us consider geography and you are in finance. It was taught to us that there is equatorial climate where it rains every day and it is sunny every day. Then there is tropical climate with seasons divided over the year. Then there are Mediterranean and arctic climates. Now if you do end up in equatorial countries during your financial operations then you are sure to take the vagaries of equatorial climate into account while planning your activities. Thus you have made good use of the knowledge. And if you do not end up in the arctic regions then corresponding knowledge is of no use to you. I suppose we end up in soup when we know that there are supposed to be five Prayers in a day and we just go for Maghrib Prayers only.

I'll stop there because we are entering technical Matters (masa-il).

If you memorize a Du'a and then you recite it once then you have used it and it has given you benefit.