The method to reach Brahman as prescribed in Mundakopanishad.

Satyen labhyastapas hosh atma samaya gyanena bramhacharin nityam|
Anthaha shareera jyothirmayohee subroyum pashyanthi yatya:ksheenadosha||

Meaning:
Truth penance , understanding and purity are essential to realise Brahman,within. When the heart is cleansed Brahman is revealed as a shining light burning brilliantly within oneself.

Further--
As a skillful archer when aiming makes his arrow merge in the target in his sight and the two become but one and the same thing, so should your 'self' the arrow be merged by concentration in the target viz--Brahman.