He failed at Catholic in a sense. He was an atheist who was converted by none other than the devoutly Catholic J.R.R. Tolkien who was then supremely annoyed that Lewis said, “you’re right. God exists. The Anglican flavor.”

The faith of children is also a recurring theme in the Bible.

Matthew 18: 2-4, for instance

^2 He called a child, whom he put among them, ^3 and said, ‘Truly I tell you, unless you change and become like children, you will never enter the kingdom of heaven. ^4 Whoever becomes humble like this child is the greatest in the kingdom of heaven.

1 Corinthians: 13 (one of the most-quoted chapters in the Bible, and a beautiful description of love even if you don’t have faith) also compares the difference between childishness and adulthood to the difference between the partial understanding of the universe we have now to true understanding.

13 If I speak in the tongues of mortals and of angels, but do not have love, I am a noisy gong or a clanging cymbal. And if I have prophetic powers, and understand all mysteries and all knowledge, and if I have all faith, so as to remove mountains, but do not have love, I am nothing. If I give away all my possessions, and if I hand over my body so that I may boast,[a] but do not have love, I gain nothing.

Love is patient; love is kind; love is not envious or boastful or arrogant or rude. It does not insist on its own way; it is not irritable or resentful; 6 it does not rejoice in wrongdoing, but rejoices in the truth. It bears all things, believes all things, hopes all things, endures all things.

Love never ends. But as for prophecies, they will come to an end; as for tongues, they will cease; as for knowledge, it will come to an end. For we know only in part, and we prophesy only in part; but when the complete comes, the partial will come to an end. When I was a child, I spoke like a child, I thought like a child, I reasoned like a child; when I became an adult, I put an end to childish ways. For now we see in a mirror, dimly, but then we will see face to face. Now I know only in part; then I will know fully, even as I have been fully known.

And now faith, hope, and love abide, these three; and the greatest of these is love.

In order to see the magic of Narnia, childishness is required, because to see it as an adult is to see beyond the fantastical. In understanding, the ability to see the magic is lost.

They can, but the same rules tend to apply. Maturity is a consequence of adversity. People who live frictionless lives tend not to develop it.

Kids generate a lot of anxiety and no small amount of trauma (particularly for the person carrying the pregnancy to term). Even before the child arrives, there’s also the real possibility of failed pregnancies. I have dozens of friends with kids, but I can count the number of women who have never experienced a miscarriage on one hand. Then there’s the first six months of caring for a newborn, which is intense. There are childhood injuries and illnesses that you feel as fiercely as if they’d happened to you. And there’s the general process of watching a child mature into an adult, and the emotional turbulence of that process.

There’s also the experience of watching an elder loved one - a grandparent or parent or beloved aunt/uncle - grow infirm and die. It weighs on you, both directly as a caregiver and indirectly as a reminder of the mortality of younger loved ones.

Grief has a huge impact on personality.

When I was young people used to tell me “You’re wise beyond your years” Thanks! That’d be the trauma.

This really depends long-term. Not everyone that experiences trauma develops PTSD, but at least speaking for myself, I’ve had a few decades of hopelessness, helplessness, and a lot of general emotional immaturity for my age. Particularly since so much of it occurred when I was a kid and heard the line about being mature…I regress to that childish mindset often in my 30s still. It’s taken a lot of effort to develop the social support I’ve needed in conjunction with therapy and education to even start the process of actively healing rather than just surviving.

I gave a fact; that he was having an affair with an older woman who died shortly after the book was published. You are the one who claims that he was upset about child marriage. When we talk about people making things up, let’s remember who is basing their posts in facts, and who is basing them in unrelated conjecture.

Here’s my “theory”. He was having an affair with a woman, and like all hypocrites, he wanted to feel as though it was something that others were guilty of, too. So, he had a woman who, at the end of her life, is having regrets about their relationship. Lewis is upset that she doesn’t like their relationship anymore, and he vilifies her and in his writing says that she’s not getting into heaven because she’s an adultress.

Do I have any proof? No. Do you? No, also. However, this is based on real events that happened to him, and your idea is just “well, maybe he was into child marriage.”

Lewis is well-known for having an Oedipus complex. There is nothing to indicate he was attracted to or abused children.