If one is determined to learn about one's Lord...
Take care of yourselves; he who errs cannot hurt you when you are on the right path.” (5:105) In this verse Allah is telling us to take care of ourselves, to pay attention to ourselves, that we must be careful about the well-being of our spirits, that we must be aware of the diseases of our souls, and how to cure them. He also tells us that we should pay attention to our duties, made obligatory on us as Muslims.
Then He tells us that if we understand the way, that if we are faithful and committed believers, those who are misled will not harm us. From this we understand that our first duty is to take care of ourselves spiritually. Sometimes a question may arise here about the relationship between the believer and society. Does the above verse mean that we should focus on ourselves and not pay any attention to the society at large?
To answer this question let us see what Allamah Tabataba'i says on this topic in his landmark work, Al-Mizan. This great interpreter and scholar of the Glorious Qur'an explains that what is meant here is that we should take care of ourselves, and be familiar with our social and private duties, so that we can also be socially responsible. For instance, in Islam we are commanded to advise people to do good and forbid them from evil deeds.
One who does not perform this duty is not considered a devout Muslim, the reason being that he is not helping the society to better itself. So, in Islam taking care of oneself spiritually is closely interwoven with being concerned with the welfare of the society as well. Conversely, it is important to remember that the society can greatly influence a person, weakening or strengthening one's faith.
Another question that may come up is “Are we responsible for guiding non-Muslims as well?” The answer is an unequivocal yes, although the most important thing before doing that is to conduct oneself in such a pious, righteous manner that others are able to see the immense practical benefits of being a faithful Muslim.