In the beginning there may be some mistake, but we must see that "Whether my mistakes are now correct?" That should be vigilance. Never trust the mind. That is the instruction here. Mind should not be trusted. My Guru Mahārāja used to say that "After getting up from your sleep, you take your shoes and beat your mind hundred times. This is your first business. And while going to bed, you take a broomstick and beat your mind hundred times. Then you can control your mind. Otherwise it is very difficult."
So this is... This beating with shoes and broomstick is also another tapasya. For men like us, who have no control over the mind, we should practice this tapasya, beating the mind with shoes and broomstick. Then it can be controlled. And swami means who has control over the mind. Vāco-vegam, krodha-vegam, udara-vegam, upastha-vegam, manasa-vegam, krodha-vegam, etān vegān yo viṣaheta dhīraḥ pṛthivīṁ sa śiṣyāt (NOI 1). This is Rūpa Gosvāmī's instruction.