Some do not trust God because they believe they know better than he does what will bring them happiness. It is written:
5 Trust in the Lord with all thine heart; and lean not unto thine own understanding.
6 In all thy ways acknowledge him, and he shall direct thy paths.
7 Be not wise in thine own eyes: fear the Lord, and depart from evil. (Proverbs 3)
Paul gave what may be the most important reason to trust God. He said: “Eye hath not seen, nor ear heard, neither have entered into the heart of man, the things which God hath prepared for them that love him.” (1 Corinthians 2:9) If you truly believe that God knows all things and that he is all loving, you must necessarily believe that anything he wills for you is in your best interest.
God, seeing all things, is so much more capable of orchestrating our happiness than we are. The Lord taught:
19 Lay not up for yourselves treasures upon earth, where moth and rust doth corrupt, and where thieves break through and steal:
20 But lay up for yourselves treasures in heaven, where neither moth nor rust doth corrupt, and where thieves do not break through nor steal:
21 For where your treasure is, there will your heart be also.
22 The light of the body is the eye: if therefore thine eye be single, thy whole body shall be full of light.
23 But if thine eye be evil, thy whole body shall be full of darkness. If therefore the light that is in thee be darkness, how great is that darkness!
24 No man can serve two masters: for either he will hate the one, and love the other; or else he will hold to the one, and despise the other. Ye cannot serve God and mammon.
25 Therefore I say unto you, Take no thought for your life, what ye shall eat, or what ye shall drink; nor yet for your body, what ye shall put on. Is not the life more than meat, and the body than raiment?
26 Behold the fowls of the air: for they sow not, neither do they reap, nor gather into barns; yet your heavenly Father feedeth them. Are ye not much better than they?
27 Which of you by taking thought can add one cubit unto his stature?
28 And why take ye thought for raiment? Consider the lilies of the field, how they grow; they toil not, neither do they spin:
29 And yet I say unto you, That even Solomon in all his glory was not arrayed like one of these.
30 Wherefore, if God so clothe the grass of the field, which to day is, and to morrow is cast into the oven, shall he not much more clothe you, O ye of little faith?
31 Therefore take no thought, saying, What shall we eat? or, What shall we drink? or, Wherewithal shall we be clothed?
32 (For after all these things do the Gentiles seek:) for your heavenly Father knoweth that ye have need of all these things.
33 But seek ye first the kingdom of God, and his righteousness; and all these things shall be added unto you.
34 Take therefore no thought for the morrow: for the morrow shall take thought for the things of itself. Sufficient unto the day is the evil thereof. (Matthew 6)
The Psalmist said:
1 Lord, I put my life in your hands.
2 I trust in you, my God, and I will not be disappointed. (Psalm 25, ERV)
What Christian can really say they truly trust God? Yet, any person who truly wants to acquire the character of God must come to this point.
If we really trust God, our desires all focus on him. When we trust God, we no longer value what the world has to offer, and instead focus completely on what God has to offer. Though we will appreciate temporal blessings God grants us, these things will always be in the context of complete trust in and submission to him, not ends in themselves.
God-oriented desire was perhaps the defining quality of the Lord Jesus Christ when he lived as a mortal on this earth. Having been stripped from his glory and knowledge in his humble birth, desire is the one thing he retained from before his birth--his supreme desire to seek and submit to the Father’s will. Though some claim that he lived as a God—meaning with power not available to other mortals—you will find that in actuality all of that came in response to his seeking the Father’s will and obeying it. This desire, above all else, differentiated him from every other person who has been or will be born on this earth.
If you truly want to be like the Lord Jesus, you have to trust the Father just as much as he did. The Preacher said: "The wise man's eyes are in his head, but the fool walketh in darkness..." (Ecclesiastes 2:14).
If you turn to God, God will show you your true desires. They won’t be how you wish they were, but seeing them as they really are is the first step towards changing them into what you want them to be. The Lord taught that the light that reveals things as they really are is available to all, if we will just turn to him:
17 For God sent not his Son into the world to condemn the world; but that the world through him might be saved.
18 He that believeth on him is not condemned: but he that believeth not is condemned already, because he hath not believed in the name of the only begotten Son of God.
19 And this is the condemnation, that light is come into the world, and men loved darkness rather than light, because their deeds were evil.
20 For every one that doeth evil hateth the light, neither cometh to the light, lest his deeds should be reproved.
21 But he that doeth truth cometh to the light, that his deeds may be made manifest, that they are wrought in God. (John 3)
Trusting God leads to greatest joy. It is the best decision you can make in any situation. The Psalmist wrote:
3 Trust in the LORD, and do good; dwell in the land and befriend faithfulness.
4 Delight yourself in the LORD, and he will give you the desires of your heart.
5 Commit your way to the LORD; trust in him, and he will act.
6 He will bring forth your righteousness as the light, and your justice as the noonday.
7 Be still before the LORD and wait patiently for him; fret not yourself over the one who prospers in his way, over the man who carries out evil devices!
8 Refrain from anger, and forsake wrath! Fret not yourself; it tends only to evil.
9 For the evildoers shall be cut off, but those who wait for the LORD shall inherit the land.
10 In just a little while, the wicked will be no more; though you look carefully at his place, he will not be there.
11 But the meek shall inherit the land and delight themselves in abundant peace.
12 The wicked plots against the righteous and gnashes his teeth at him,
13 but the Lord laughs at the wicked, for he sees that his day is coming.
14 The wicked draw the sword and bend their bows to bring down the poor and needy,
to slay those whose way is upright;
15 their sword shall enter their own heart, and their bows shall be broken.
16 Better is the little that the righteous has than the abundance of many wicked.
17 For the arms of the wicked shall be broken, but the LORD upholds the righteous.
18 The LORD knows the days of the blameless, and their heritage will remain forever;
19 they are not put to shame in evil times; in the days of famine they have abundance.
20 But the wicked will perish; the enemies of the LORD are like the glory of the pastures; they vanish—like smoke they vanish away. (Psalm 37 ESV)
Trusting God is difficult to implement, but fairly straightforward to motivate. If we would come to be more like God, we must actually believe that God really is who he says he is. Paul said, “he that cometh to God must believe that he is, and that he is a rewarder of them that diligently seek him.” (Hebrews 11:6) If you actually believed that God was the source of all truth, and that he perfectly loved you, you would rest in assurance that his will is right and in your best interest. You would hold nothing back from him, seek him fully, and obey him completely. That such is not the case is the only proof you need to accept the idea that you could believe in God more than you do.
God knows all things, and it is precisely because of this knowledge that we ought to yield to him in all things. He is uniquely positioned to guide any and everyone to a greater place than they are now.