The power of creation given by Brahmadev is present in every human being. With which he keeps moving forward in his life by creating or creating anything. Due to which his body and mind also keep supporting. This is the reason that his life force keeps developing by becoming stronger.
When you pronounce Omkar, the powers of Brahma, Vishnu and Mahesh get awakened inside you. There is only one Parabrahma Parmatma who runs the whole world and Guru is said to be the form of all three. In which the energy powers of all three are stored and through them it comes to the disciple by reflecting.
When you meditate and chant the mantras given by the Guru, then you directly connect with the powers of Parabrahma Parmeshwar. The mantra of Parabrahma Parmeshwar is the Guru Mantra. Become a creator and make your life force strong.