The impersonal aspect [of God] (Nirakara, Nirguna) is called Brahman, or 'unknowable' by Herbert Spencer, 'will' by Schopenhauer, Absolute Noumenon by some 'substance' by Spinoza. The personal aspect (Sakara) of that Being is termed 'Ishvara' or Allah, Hari, Jehova, Father in Heaven, Buddha, Siva, etc. Just as vapour or steam is formless, so also God is formless in His unmanifested or transcendental state.
SivanandaThe mental ability to concentrate is inherent to all; it is not extraordinary or mysterious. Meditation is not something that a Yogi has to teach you; you already have the ability to shut out thoughts.
SivanandaFaith induces one to pray.Prayer purifies the heart.In the purified heart is reflected the light of Lord.When the Light sighns the mortal becomes immortal.
Sivananda