There are many questions about how God speaks to us.
But there is no simple answer to that question.
Because God can speak to us through His Word, through the Sacraments, through our prayer, through our experiences and through other people.
But we can be quite certain that when God speaks to us, we will know that it is His voice.
Because it will have a specific message for us and we will also know that the message is for us.
As in the 1st reading, when Jonah proclaimed the destruction of Nineveh, the people knew that the message was for them and for them alone.
Even without being told, they repented of their evil, from the king right down to the animals.
Jesus even mentioned about their repentance when Jonah preached to them.
Yes, God speaks to us and we will know that it is His voice because it will be a personal message for us.
Let us listen, let us do what God wants of us, let us repent and we will know how much God loves us.