Matthew 8:5-13 (Luke 7:1-10)
And when Jesus entered Capernaum, a centurion came to Him, imploring Him, and saying, “Lord, my servant is lying paralyzed at home, fearfully tormented.” Jesus said to him, “I will come and heal him.” But the centurion said, “Lord, I am not worthy for You to come under my roof, but just say the word, and my servant will be healed. For I also am a man under authority, with soldiers under me; and I say to this one, ‘Go!’ and he goes, and to another, ‘Come!’ and he comes, and to my slave, ‘Do this!’ and he does it.” Now when Jesus heard this, He marveled and said to those who were following, “Truly I say to you, I have not found such great faith with anyone in Israel. I say to you that many will come from east and west, and recline at the table with Abraham, Isaac and Jacob in the kingdom of heaven; but the sons of the kingdom will be cast out into the outer darkness; in that place there will be weeping and gnashing of teeth.” And Jesus said to the centurion, “Go; it shall be done for you as you have believed.” And the servant was healed that very moment.

Webster’s Dictionary 1828
Faith
Faith is an affectionate practical confidence in the testimony of God. Faith is a firm, cordial
belief in the veracity of God, in all the declarations of his word; or a full and affectionate confidence in the certainty of those things which God has declared, and because he has declared them.
Presumptuous/To Act Presumptuously
To act willfully, arrogantly, in bold defiance of conscience or in violation of a known duty; as to sin presumptuously with groundless and vain confidence in the divine favor.

• Romans 14:23b
  …and whatever is not from faith is sin.
• Hebrews 11:1-2
  Now faith is the assurance of things hoped for, the conviction of things not seen. For by it the men of
  old gained approval.
• Hebrews 11:6
  And without faith it is impossible to please Him, for he who comes to God must believe that He is and
  that He is a rewarder of those who seek Him. …Abel, Enoch, Noah, Abraham…Sarah…Moses…
• John 3:3, 5-8
  Jesus answered and said to him, “Truly, truly, I say to you, unless one is born again he cannot see the kingdom of God.” … Jesus answered, “Truly, truly, I say to you, unless one is born of water and the Spirit he cannot enter into the kingdom of God. That which is born of the flesh is flesh, and that which is born of the Spirit is spirit. Do not be amazed that I said to you, ‘You must be born again.'”
• 1 Corinthians 2:4-5
  …and my message and my preaching were not in persuasive words of wisdom, but in demonstration of the Spirit and of power, so that your faith would not rest on the wisdom of men, but on the power of God.
• Ephesians 2:8-10
  For by grace you have been saved through faith; and that not of yourselves, it is the gift of God; not as a result of works, so that no one may boast. 10 For we are His workmanship, created in Christ Jesus for good works, which God prepared beforehand so that we would walk in them.
• Ephesians 3:11-12
  This was in accordance with the eternal purpose which He carried out in Christ Jesus our Lord, in whom we have boldness and confident access through faith in Him.
• Hebrews 11:13
  All these died in faith, without receiving the promises, but having seen them and having welcomed them from a distance, and having confessed that they were strangers and exiles on the earth.