Then Jesus told the centurion, “Go. As you have believed, let it be done for you.” And his servant was healed that very moment.
Matthew 8:13 (CSB)
The army officer had told Jesus that if He would just say the word, his servant would be healed. Jesus spoke, and the servant was healed at that very moment, even though Jesus never went to the house.
When Jesus said, “As you have believed,” He meant that it would happen just the way the officer trusted it would. It does not mean that God heals people according to how strongly they believe. The apostle Paul, one of the men Jesus sent to preach, begged God three times to take away his suffering, and God answered, “My grace is sufficient for you, for my power is perfected in weakness” (2 Corinthians 12:9).
If we have prayed for someone who was not healed, it does not mean they or we did not have enough faith. Their sickness is not proof that God is angry with them, and He has not stopped caring. Sometimes He heals, and sometimes He gives grace, His undeserved help, to carry what He does not take away.
Faith means trusting Jesus’ word even before we see the answer. Jesus said, “Blessed are those who have not seen and yet believe” (John 20:29). Jesus promised that whoever hears His word and believes has eternal life (John 5:24), because He died for our sins and rose again.