BG Chap 7 - The Lord gives faith to worship the demigods
The Lord seated in everyone’s heart, makes the faith of the demigod worshipper steady so that he could devote himself to the particular deity. It is not the devatās, pleased with being worshipped, who produce faith in worshipping the Supreme Lord in order to benefit their worshippers. The devatās cannot even produce faith in those people to worship the devatās. When those people desire to worship forms such as Sūrya, which are actually the forms of the Lord’s body since they are His vibhūtis, the Lord gives faith in those forms of devatās. The Lord inspires to worship the devatās and bestow the respective results of the worship of each devatā.
Why does the Lord give faith to worship the demigods? The demigod worshipper gets results of his worship, which are actually given by Kṛṣṇa, because the devatās arise from the body of the Lord. The Lord considers faith in the demigod is indirectly faith in His form. But still such worshippers cannot be liberated because they have not directly approached Lord Kṛṣṇa. If the Supreme Lord as Supersoul does not give such facilities as to worship the demigods to satisfy desires, then there is no meaning to independence. Therefore He gives everyone full independence—whatever one likes—but His ultimate instruction we find in the Bhagavad-gītā: one should give up all other engagements and fully surrender unto Him. That will make man happy.