TM is not being taught as a Religion, therefore one must still practice Religion for progress. Just like a traveler needs a map (Religion) until he knows the way, so Religion is instrumental for spiritual progress.
Initially meditation (dhyana) was taught in a broader context of Sanatana Dharma (the eternal Religion of the Vedas) which contained the Father of Yoga's Patanjali's recommended *eight* limbs. MMY is only teaching a few of those limbs when all eight were recommended, in particular left out are Yama and Niyama (akin to the ten commandments). So don't sell yourself short, start practicing Religion and watch how much more quickly you advance spiritually.
