RE: "Humans are limited in their capacity to understand the world... Do you agree?"
Humans are said to be limited in their capacity to understand God; that's why we are always told that God works in mysterious ways. But we are less limited in our capacity to understand the world, since we don't have to accept things on blind faith but can at least go forth and investigate natural phenomena.
RE: Does faith in God mean all things/acts of Creation are important?
Hardly. Some products of alleged creation would be evidence of poor design:
In Hinduism there are four kind of people who seek God. 1) Devotional type. Their main tool is their love of God. They need not bother about creation and other things of the world. 2) People who work for God. They do work in the spirit of service and offer the fruits of their work to God as a sacrifice. These people also need not bother about creation etc. 3) Mystic type. These people try to approach God by learning the spiritual mysteries of the human body and the world. In this, some mystics do gain some knowledge about the creation of the world. 4) Path of knowledge: People who follow this path of enquiry about the ultimate reality try to know God. When they succeed in acquiring the knowledge of God, they find that God Himself is their inner most soul. That there is no difference between them and the God they were looking for. Some of these kind of people also take interest in the Creation of the universe etc. As a result they can very clearly see that the God Himself has become the entire universe. More details can be found in following books.
Admiration of the world, and in fact only parts are demonstrably admirable, is not religious in nature. Creation is/was not an act but an ongoing process.
Surely faith in God means faith in everything .... It is not right to believe in certain things and not to believe in another ... In all religions faith must be fully and in everything
Notably, man's knowledge of understanding the true essence of creation and creator is , as you rightly observe, fragmentary and piecemeal. As such, in their pursuit of solving this labyrinthine puzzle, humans follow different ideologies and religions. The reason behind such diverse beliefs often leads to conflicts because one fails to balance what one sees what one believes in. As a consequence, we need to accept our limitations and we need to learn how to live peacefully with those who perceive the realities of the world through different lenses. After all, a man's meat may be another man's poison.
An appreciation in what is around us, how things are made, does not necessitate a belief in someone/something making it. Alongside such acceptance of deities are the ideologies that go with such belief-which certainly do not sit comfortably with me. But, as Reza, says: live and let live. If belief gets you through the day, why not?
people who believe in god believe that everything that happens and everything that exists around them is part of God's creation, whether good or bad, sometimes even blinding those people.
Hmm. If we choose to believe in God, the Creator, then ultimately, God's Creation is the sole responsibility of God. And the ways of GOD are not the ways of mere mortals like us. The evil in the human world or elsewhere cannot defeat GOD's will for Creation over time or over space...
2 Corinthians 4:18 (KJV) "While we look not at the things which are seen, but at the things which are not seen: for the things which are seen are temporal; but the things which are not seen are eternal."