Kizayis, Kebeitzah, Toich Kedai Achilas Pras, Zman Kriyas Shemah
Why is god so into details what are their significance(e.x why does god care if I daven after Zman Kriyas Shemah)?
Here's one to start with, on Chabad.org. Key paragraphs:
Another point is that we are mistaken if we think of Hashem as a CEO or a president, who needs to be able to focus on the "big picture" rather than getting tangled up in the minutiae that are better delegated to subordinates. Hashem is, as we say in the Rosh Hashanah and Yom Kippur prayers, השוה ומשוה קטן וגדול - the One to whom small and great are equal, because He is infinitely greater than all of them. So the tiny details of mitzvos are no less part of His purview than the big things - and by our paying attention to those tiny details, we demonstrate our belief in this idea.
1) When we do Mitzvos for H', it is not because H' needs our mitzvos. It is because H' wants us to make a relationship with Him and He knows the best way for that to happen.
On a person's 25th anniversary, would they rather a bouquet of roses or, a cake just like the one they ordered on their first date with flowers that are the same color of the tie he was wearing when they met. Obviously, (although a little bit cheesy), the second choice is preferable.When you're working on a relationship, the MOST important aspect is remembering the details!
2) If you work really hard on a dress for someone - fix the hem, dye it for anew color, sew thirteen flowers on it, each exactly two inches apart, etc. and you work on it for three weeks, how will you feel if they say: "thanks for the dress." Um, that's nice but do you see how the flowers match the dress perfectly? Did you notice that I fixed the zipper? Do you REALIZE how much work went into this?
The same applies to H' - When we put a seed in the ground, H' makes it rot and then grow, makes the water seep into the seed causing growth, makes a plant come out of the ground, makes it grow wheat, the wheat is threshed, we grind it into flour, we combine the ingredients for bread, we knead and bake until finally you are sitting with a peanut butter sandwich. How would H' feel if we said "thanks" and then took a bite. Um, do you even realize what just happened? Each food has its own bracha because H' wants us to think about it and to show we really know what we are eating/ THe ochel vs. the pesoles, what are we eating it for.... all these details ARE really necessary - to properly thank H'!