‘In these last days He has spoken to us by His Son. Hebrews 1:2
Our faith is unique in that God speaks to us. It is not usually in an audible voice as it was in Biblical times. It is often through dreams, visions, nature (God said let their be light), the Bible, prayer, other believers.
Most importantly He has spoken by His Son. We are told ‘do not harden your hearts as you did in the rebellion.’ There is no excuse not to listen.