We need toilet, food, drinks, rest, sleep, protection from cold, heat etc. But our purpose it to worship Allah. Therefore we must remember that it is the needs that we must sacrifice for our purpose and not the other way around.
The example is just like of any other purpose we chase. When one of us is fully engrossed in some activity, say someone is watching a really interesting movie, or someone is reading a really interesting book or someone is really absored in solving some problem etc., we totally forget our surroundings. We sometimes forget to eat, drink, go to the washroom, neglect the temperature around us etc. for hours. Likewise, if obeying Allah is so important for us, if that is our ultimate purpose, then we must be able to sacrifice all other things.
In fact, the best way is to balance the needs with purpose. We must be fully engrossed in the purpose, but we musn’t totally neglect the need. For our needs are what help us achieve the purpose. But what’s important is that we realize that when the time for sacrifice comes, we know exactly what is to be sacrificed and what our priority is.
Note: One way to imagine the situation is to imagine how fired up we are while chasing our passions and goals.
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