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.
SivanandaDo not store in your brain useless information. Learn to unmind the mind. Unlearn whatever has been of no use to you. Then only can you fill your mind with divine thoughts.
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.
SivanandaThe divine within you is stronger than anything that is without you. Therefore, be not afraid of anything. Rely on your own Inner Self, the Divinity within you. Tap the source through looking within. Improve yourself. Build your character. Purify the heart. Develop the divine virtues. Eradicate evil traits. Conquer all that is base in you. Endeavor to attain all that is worthy and noble. Make the lower nature the servant of the higher through discipline, Tapas, self-restraint and meditation. This is the beginning of your freedom.
Sivananda