Do not receive sacred gifts in vain

"Working together, we appeal to you not to receive the grace of God in vain." (2 Corinthians 6: 1)

Do not receive the word of God in vain.

Do not receive the Eucharist in vain.

Do not receive the Sacrament of Reconciliation in vain.

How can we be sure that we do not receive these graces in vain? We can only be sure if we are open to the Holy Spirit residing in us.