God isn’t a mumble mouth. He doesn’t mutter things in our general direction just hoping we hear Him clearly. Scripture teaches us that from the beginning, the invisible things of God, His eternal power and Godhead have been clearly seen (Rom. 1:20). From the very start God spoke to Adam, and then Noah, Abraham, Moses, David, and the prophets. In these last days, He speaks to us by His Son, Jesus Christ (Heb. 1:1-3).
God speaks to us, because He loves us. He first spoke ears into existence, then He spoke His Word to us. He created us, then He conversed with us. This is what we call God’s general revelation (creation) and God’s special revelation (Scripture). But all of it is God speaking clearly to us. So, we must listen to Him, believe Him, and do His Word.