Psalm 91:1-10 says,

1 He who dwells in the secret place of the Most High shall abide under the shadow of the Almighty.

2 I will say of the LORD, "He is my refuge and my fortress; My God, in Him I will trust."

3 Surely He shall deliver you from the snare of the fowler and from the perilous pestilence.

4 He shall cover you with His feathers, and under His wings you shall take refuge; His truth shall be your shield and buckler.

5 You shall not be afraid of the terror by night, nor of the arrow that flies by day,

6 Nor of the pestilence that walks in darkness, nor of the destruction that lays waste at noonday.

7 A thousand may fall at your side, and ten thousand at your right hand; but it shall not come near you.

8 Only with your eyes shall you look, and see the reward of the wicked.

9 Because you have made the LORD, who is my refuge, even the Most High, your dwelling place,

10 No evil shall befall you, nor shall any plague come near your dwelling;

This means sickness and disease will not come near your house, provided you dwell in the secret place of the Most High, and abide under the shadow of the Almighty.

This passage goes on to say in verse 11: For He shall give His angels charge over you, to keep you in all your ways.

You may be afraid of flying on an airplane, of going outside at night, or of any number of other things.  Fear is a terrible thing; there is nothing worse than being afraid.  But you do not need to be afraid because your Heavenly Father has given "His angels charge over you, to keep you in all your ways."

Every one of us has a guardian angel.  That angel has been keeping you from getting your head blown off many times over.  He will keep you alive when you are a sinner, so that you can be saved.  Notice that verse 11 says you have angels, plural.  Not only do you have angels, but the Bible says God will give His angels charge over you.  This means He commissions them to mount guard over you.

However, the angels cannot do anything for you to the fullest extent possible unless you are willing to believe they are there, count on them and expect them to work for you.  You have to dare to believe it, dare to take God at His Word, and dare to confess it.  Once you do this, amazing things will happen.

Psalm 91:12-13 continues:

12 In their hands they shall bear you up, lest you dash your foot against a stone.

13 You shall tread upon the lion and the cobra, the young lion and the serpent you shall trample underfoot.

These verses let us know that the devil and every demon are under our feet.

Psalm 91:14-16:

14 "Because he has set his love upon Me, therefore I will deliver him; I will set him on high, because he has known My name.

15 He shall call upon Me, and I will answer him; I will be with him in trouble; I will deliver him and honor him.

16 With long life I will satisfy him, and show him My salvation."

My advice to you, friend, is to get this Word in you.  Then confess it, and dare to make it personal.  Say out loud, "I dwell in the secret place of the Most High, and I abide under the shadow of the Almighty.  A thousand can fall at my side, and 10,000 at my right hand, but no evil shall come near me, because I dwell in the secret place of the Most High." 

It is this kind of faith confession that makes God's Word work and puts the power into operation in your life.