Our this material sufferings, why? Due to our sinful activities. Sinful activities mean anything you do without any purpose to serve to Kṛṣṇa, that is sinful. That is sinful. Not that "In the material calculation this is very good work, the opening of hospital or this or that, very good work. And Deity worship and going to the temple is bogus." You may think like that. But that, your opening of hospital, is sinful. That is going on nowadays. One becomes very great philanthropist, rejecting . . . They say, "What is the use of this temple worship?" The daridra-nārāyaṇa-sevā. Nārāyaṇa has now become daridra. Formerly Nārāyaṇa was husband of the goddess of fortune, and now He has become daridra. So serve this Nārāyaṇa. This, they're manufacturing, concoction. This is not . . . That means sinful activities. Because he has manufactured something, that is sinful. Therefore Kṛṣṇa says plainly that "You rascal, you give up any other engagement, even if you think it is very pious activity, very philanthropic. You give up." Sarva-dharmān. Sarva means whatever you think pious and whatever you think impious, both of them should be given up. Because there are two kinds of activities: pious or impious. And sarva includes pious and impious.
So you have to give up everything. Simply you have to become ready, "My Lord, I am now fully surrendered. Whatever You ask me, I shall do it." Then you are liberated person.