pure in heart (Matt5:8)

Matthew 5:8

Blessed are the pure in heart, for they shall see God

The heart is what you are, in the secrecy of your thought and feeling, when nobody knows but God. 

Piper

Man looks at the outward appearance, God looks at the heart. We try to look pure to impress others and maybe God. God requires a clean heart. A pure heart will result in seeing God, being welcomed in to his presence. So all those with a pure heart form an orderly queue!

If we think we meet this criteria, that is a clear sign that we don't - we haven't recognised our spiritual poverty, owned our sin, responded humbly and hunger and thirsting for God. If those things are true then we will cry out like David "Create in me a clean heart, O God, and renew a right spirit within me." (Psalm 51:10). Fortunately, God can and will do that. The only person to ever live with a pure heart, died in our place so that we can be washed clean and enter into God's presence.