What does the expression 'no man can come unto me' mean?

'No man can come unto me, except it were given unto him of my Father' (John 6:65) emphasizes the sovereignty of God in salvation. This statement reveals that the initiative to draw souls to Christ comes from the Father. It dispels the notion that faith in Christ can be accomplished by human effort; rather, it is a gift bestowed by God’s grace. This underscores the biblical doctrine of total depravity, where the natural man, in his sin, cannot choose God unless God first intervenes and enables him.