Isaiah 59:1-2
Behold, the Lord’s hand is not so short that it cannot save, nor His ear so impaired that it cannot hear. But your wickedness has separated you from your God, and your sins have hidden His face from you so that He does not hear.

When we sin, our focus changes from what is Godly, and we turn our vision away from the Lord. Sins keep us separate from God by changing our thinking and diminishing our value in our minds but not to God. Sins blind the mind and heart when all it takes is for us to confess our sins and turn back to God so we can be saved.