1 Corinthians 11:28-29

But a person must (prayerfully) examine himself (and his relationship to Christ), and only when he has done so should he eat of the bread and drink of the cup. For anyone who eats and drinks (without solemn reverence and heartfelt gratitude for the sacrifice of Christ), eats and drinks a judgement on himself if he does not recognize the body (of Christ).

We all need a heart checkup to ensure we are where we should be in our spirit.  We don’t want to take the sacrifice of Jesus lightly because Jesus gave all to save us.  We need to honor the sacrifice, purify our hearts, and remove any hindrances between Jesus and us. It can take a second to change our attitude and get back in the flow of the spirit.