The following text is what I have had read from a website, but I am confused and do not understand who Brahman is, and how is he the greatest Hindu deity? And how is Brahma the higher than Vishnu and Siva?
Brahman – The absolute God of Hindus
“Brahman is the highest and most supreme divinity of the Hindus.
Brahma is the source, the seed and the creator of all beings in this world. He has many other names Hiranyagarbha … followers of Vaishnavism depict him as nabhija or the one who was born from the lotus flower that sprung from the navel of Vishnu. This is however a post-vedic development.
Brahma originated from Brahman, or rather Brahman became Brahma, just as he became Vishnu and Siva.
Brahman is the central theme of almost all the Upanishads.
Brahman is the indescribable, inexhaustible, omniscient,
omnipresent, original, first, eternal and absolute principle who is
without a beginning, without an end , who is hidden in all and who
is the cause, source, material and effect of all creation known,
unknown and yet to happen in the entire universe.
He is not like the other gods either. He is incomprehensible even
to almost all the gods. And He chooses not to be worshipped in the
temples and other places of worship but in one's heart and mind
as the indweller of the material body and master of the senses,
the charioteer. He is too remote and incomprehensible to be
revered and approached with personal supplications although He is
the deepest and the highest vision mankind could ever conceive of
or attain.
Perhaps the exclusion was so evident and seemingly so intentional
that even Lord Brahma, the first among the Trinity and the first
among the created, was also simultaneously excluded from the
ritualistic worship, probably for the similarity in names.”