According to muslim belief, in what way did meditation lead toward muhammad becoming a prophet?

Prophet Muhammad (pbuh) use to go to the cave named "Hira"  to spend time meditating and worshipping Allah(swt). During the time of meditation the angel Gabriela appeared to reveal the first vitae of the Holy book of Islam(the Quran). It was not only the meditation that made him a prophet, but also his devotion and love for Allah(swt).

Which reforms did gandhi initially promote when he joined the national congress