Protoje said this in his song "Who knows", and it has been a message repeated over many years by many in the Rastafarian community. Be knowledgeable, but also use this knowledge. Otherwise, what good is it?
4.2 oz, 100% combed ring-spun cotton jersey. Athletic Heather is 90% cotton, 10% polyester. Dark Grey Heather is 52% combed and ringspun cotton, 48% polyester Ash is 99% combed and ringspun cotton, 1% polyester