BG Chap 12 - If one is unable to do any of the methods mentioned so far...

In the first six chapters, the Lord spoke of niṣkāma-karma-yoga offered to the Lord, a method to attain liberation. In the second six chapters the Lord spoke of bhakti-yoga, the method of gaining the Lord Himself. Bhakti yoga has two types: being fixed in bhakti using internal means such as keeping the mind and intellect fixed in the Lord, or practice to keep the mind fixed on the Lord. The second type, relying on external means, is to work for Kṛṣṇa, which is easy to perform for everyone. One gets spiritual results in the form of living with Kṛṣṇa or attaining perfection by engaging in bhakti yoga.

Now for those who cannot perform bhakti yoga in either of these two types, the Lord advises to perform one’s duties with detachment from the results of work. Due to social, familial or religious considerations, one may not be able to work in Kṛṣṇa consciousness. Such persons can sacrifice the results of their activities to some good cause, and thus act in niṣkāma-karma. By engaging in charity and other philanthropic work, one gives up the hard earned results of his activities. This would purify the mind gradually. One does not, however, get any spiritual benefit by simply giving up the results of work, unless they are offered to Kṛṣṇa. But if one performs sacrifices recommended in the Vedas such as full moon sacrifice devoid of desire for results (niṣkāma-karma-yoga), these become forms of worshipping the Lord, and thus knowledge arises within the person. One realizes one’s position and the Lord’s position as servant and master, and then realizes the supreme position of the Lord. Gradually, supreme bhakti will manifest.