MANY who claims to know God

"Not everyone who says to me, 'Lord, Lord,' will enter the kingdom of heaven, but only he who does the will of my Father who is in heaven. Many will say to me on that day, 'Lord, Lord, did we not prophesy in your name, and in your name drive out demons and perform many miracles?' Then I will tell them plainly, 'I never knew you. Away from me, you evildoers!'" (Matthew 7:21-23)

When I was reading the passage, the word "MANY" has been highlighted. In the Bible, Matthew quotes Jesus saying MANY who claims to know God, and boosting what they have done, in the judgment day, Jesus will not accept their offering instead saying they are evildoers.

It tells me that going to church or serving in a ministry at church doesn't mean we are saved. It is the heart counts. God wants either all our heart or none. There is no in between. It's not possible to server both God and money. You either all in to God, or nothing. If we are lukewarm, He will split it out from His mouth.

"If we claims to be have fellowship with Him but keep walking in darkness, we lie and do not live by the truth. But if we walk in the light, as he is in the light, we have fellowship with one another, and the blood of Jesus, his Son, purifies us from all sin. But if we walk in the light, as he is in the light, we have fellowship with one another, and the blood of Jesus, his Son, purifies us from all sin." (1 John 1)