The still small voice of the Holy Spirit, His gentle promptings and impressions, though they are so quiet, and we can easily ignore them, and miss them, THEY ARE THE BIG thing.
Ironic, eh, how God works, that the BIGGEST thing comes to us as the smallest thing. (How God was manifest in human flesh and born as a baby)
That quiet impression is the Creator God speaking to you! (if your heart, mind, will and life is captive to Christ).
The natural mind, on the other hand, would expect the voice of God to be some momentous event, like thunder on the mountain, so obvious that one could not miss it.
The oh-so-gentle prompting to send a mail of encouragement to a brother or sister, to make a call, to go visit some one – - whatever : responding and obeying His promptings is the HEART of walking with Him and following Jesus.
But, notice how when we discuss this, there comes a delineation between walking by the Spirit and walking by the intellect alone.
Our intellect must be renewed by, and submitted to, the rule of Christ – His peace ruling and reigning in our hearts.