Powerful Gayathri Beej Mantra for Knowledge

In India Gayathri Beej Mantra is taught in Upanayana. Gayathri Beej Mantra is told secretly and one should learn 
from a guru rather than from book or website

Reciting Gayathri  Beej Mantra daily morning 108 times will give you all the

knowledge

Gayathri Beej Mantra 

Oṃ bhūr bhuvaḥ svaḥ

tát savitúr váreṇ(i)yaṃ

bhárgo devásya dhīmahi

dhíyo yó naḥ prachodáyāt