The body is the temple of God, He is the resident of the heart, and intelligence (Buddhi) is the lamp that is lit in its altar. Protect the lamp and its glow from the wind that blows through the windows of the senses and threatens to put them out. Close the windows, do not keep them open for dire attraction from objects. Keep your intellect sharp, so that it may cut the mind into a diamond and convert it into a blaze of light, instead of being a dull pebble. Discrimination is an important instrument of spiritual progress. Attachment, affection, and interests - these create prejudice, partiality, and illusion. They hide the truth and dull the intelligence. The reasoning faculty must be employed to distinguish between the limited and the unlimited, the temporary and the Eternal( Divine Discourse, Oct 2, 1965.)