But the Lord said to Samuel, Don't judge by his appearance or height, for I have rejected him. The Lord doesn't make decisions the way you do! People judge by outward appearance, but the Lord looks at a person's thoughts and intentions. (1 Samuel 16:7 NLT)
Have you ever been passed over and left out of the mix?
When the Lord sent the prophet Samuel to the house of Jesse to anoint a new king to replace King Saul six sons of Jesse passed by and the Lord rejected all of them. Samuel became somewhat frustrated and asked, "Are these all the sons you have?" Jesse reluctantly responded, "There is still the youngest, but he's out in the field watching the sheep." (1 Samuel 16:11) David was brought forward and God said, "This is the one, anoint him."
What does this tell us about the position, stature, and character of a person seeking to worship God? No matter how much "good" we may have done, no matter the level of our earthly accomplishments, no matter how well we use biblical terminology, no matter how spiritual we may appear, God doesn't pay any attention to those outward qualities. He's interested only in what's in a man's heart. Our attitude of heart is what counts with God. He sees the intent, the desire, the humility, the selflessness, and the love we have for him.
In order to avoid being passed over, we need to get out heart right with God.