Faith with Eyes Wide Open

There's a reason Jesus healed the blind: God wants love and faith with eyes wide open.

Occasional doubt is normal. Humans are unused to the greatness and perfection that is God. Nothing like Him exists elsewhere in our experience. Even when others have the best of intentions, they can still, through internal or external circumstances, let us down. So, complete and utter faith is a rarity that is difficult to obtain.

"After this, the word of the Lord came to Abram in a vision:

'Do not be afraid, Abram.
I am your shield,
your very great reward.'

But Abram said, 'Sovereign Lord, what can you give me since I remain childless and the one who will inherit my estate is Eliezer of Damascus?” And Abram said, “You have given me no children; so a servant in my household will be my heir.' Then the word of the Lord came to him: 'This man will not be your heir, but a son who is your own flesh and blood will be your heir.” He took him outside and said, 'Look up at the sky and count the stars—if indeed you can count them.' Then he said to him, 'So shall your offspring be.' Abram believed the Lord, and he credited it to him as righteousness." Genesis 15:1-6

Introducing Abraham and his wife Sarah, in this verse, Abram expresses his doubt that God can reward him, but by the end of the conversation, he decides to believe Him. However, he wasn't done doubting yet and neither was his wife.

"Now Sarai, Abram’s wife, had borne him no children. But she had an Egyptian slave named Hagar; so she said to Abram, 'The Lord has kept me from having children. Go, sleep with my slave; perhaps I can build a family through her.'" Genesis 16:1-2

She still believes God's power is limited. She's barren and elderly, and she's clearly not thinking God will bless her own body with the ability to conceive. Now, pause. There seems to be a time difference between when God made his promise to Abram (already considered old) and when Sarai made this decision as it states she did this "after Abram had been living in Canaan ten years.(16:3). Then, when Hagar gave birth to his son Ishmael, Abram was eighty-six years old. Fast-forward thirteen more years to when Abram is ninety-nine. God speaks once again.

"No longer will you be called Abram; your name will be Abraham, for I have made you a father of many nations... God also said to Abraham, 'As for Sarai your wife, you are no longer to call her Sarai; her name will be Sarah. I will bless her and will surely give you a son by her. I will bless her so that she will be the mother of nations; kings of peoples will come from her.' Abraham fell facedown; he laughed and said to himself, 'Will a son be born to a man a hundred years old? Will Sarah bear a child at the age of ninety?' And Abraham said to God, 'If only Ishmael might live under your blessing!' Then God said, 'Yes, but your wife Sarah will bear you a son, and you will call him Isaac. I will establish my covenant with him as an everlasting covenant for his descendants after him. And as for Ishmael, I have heard you: I will surely bless him; I will make him fruitful and will greatly increase his numbers. He will be the father of twelve rulers, and I will make him into a great nation. But my covenant I will establish with Isaac, whom Sarah will bear to you by this time next year.' When he had finished speaking with Abraham, God went up from him." Genesis 16:17-22

Abram once again expresses his doubt that his elderly wife will give birth, and she has never had any indication yet that she was indeed the one to bear God's reward. Time is passing, and it's becoming harder and harder to have faith in this already fantastical promise.
Sarah was about ninety years old when she gave birth to Isaac, his name meaning "he will laugh," reflecting the fact both of his parents laughed in disbelief at a miracle child.
One important thing I've gathered from these passages is that God didn't bash anyone for their disbelief or momentary doubt. God gives us a brain to think. He doesn't want blind faith as in sheeple. You can find numerous instances in the Bible where He denounces people being "blind" or how evil people "blind" others into following them. He even states He gave us ears to hear and eyes to see. You may have momentary doubts. Use your head to understand God, try to understand God and not merely fall away.

"Blessed is the one who finds wisdom, and the one who gets understanding." Proverbs 3:13
We need to grow. Some things will never be understood about God's nature. We need to know that we won't always have the answers for everything, but that doesn't mean we should be blind.
"For though by this time you ought to be teachers, you need someone to teach you again the basic principles of the oracles of God. You need milk, not solid food, for everyone who lives on milk is unskilled in the word of righteousness, since he is a child. But solid food is for the mature, for those who have their powers of discernment trained by constant practice to distinguish good from evil." Hebrews 5:12-14
Even God is evidenced using our senses that God gave us.
"For his invisible attributes, namely, his eternal power and divine nature, have been clearly perceived, ever since the creation of the world, in the things that have been made. So they are without excuse." Romans 1:20

He is the light, and that means He loves understanding, wisdom, and the truth. Seek the truth, and He will guide you. Don't wallow in the doubt but use it to strengthen your faith in a God who will surely always follow through on His promises. Trust in Him because He wants you to know Him, eyes wide open.