What does the Bible say about approaching the Lord?

In Matthew 15:21-28, we see a woman from Canaan who approaches Jesus seeking mercy for her daughter. Despite being initially ignored, she persists in her request, showing humility and recognizing her lowly position by referring to herself as a 'dog' in comparison to the children of Israel. This symbolizes the need for all believers to come before God acknowledging their unworthiness and dependence on His grace. Similarly, in Luke 18:9-14, the parable of the Pharisee and the publican illustrates that those who trust in their own righteousness are far from justified, while the humble sinner who acknowledges his need for mercy is exalted by God.