Sir
Gurmat does not permit philosophy of mantra. Gurmat only recommend contemplation on sabd. Thaal vich tin vastu paeyeo - sat, santokh and beecharo. It has the amrit of naam which should be our support and urge.
Reference:: Sikh Philosophy Network http://www.sikhphilosophy.net/spiritual-articles/5364-mantra-and-thought.html
Regards Sahni Mohinder