How is it possible to meditate on Brahman if it's originally beyond the senses?

Chapter 50 explains this intricate process. Brahman in its original state is beyond the senses, but it becomes 'qualified' (shabal) by being associated with Avidya, or ignorance. This qualification gives it the name 'Sat' (Existence), making it expressible. Although still beyond the senses, speech then makes it 'graspable by the intellect'. As detailed in Chapter 50, it is at this point that Brahman enters the mind and takes form through the 'Omkar'. This allows for meditation on this Omkar-Brahman. The text suggests that for one who remembers God and meditates on this at the time of death, their birth becomes fruitful.