Gradually, gradually, he should come to rest, with an understanding (buddhi) held by resolve (dhṛti); Having made the mind established in the self (ātman), he should not think of anything at all.
He should gradually become tranquil, firmly controlling his understanding; focusing his mind on the self, he should think nothing.
(25) By soul held fast in steadfastness he must make the mind [too] subsist in the self; then little by little will he come to rest; he must think of nothing at all.
6.25 One should gradually withdraw with the intellect endowed with steadiness. Making the mind fixed in the Self, one should not think of anything whatsoever.
6.25 Little by little one should withdraw oneself from the objects other than the self with the help of the intellect held by firm resolution; and then one should think of nothing else, having fixed the mind upon the self.
6.25 Little by little let him attain to quietude by the intellect held firmly; having made the mind establish itself in the Self, let him not think of anything.