In loving memory of Lawrence Pasternack (1967-2024): a great teacher, person, and Kantian Scholar.

I focus on the 6 Kantian arguments for the a priori and intuitive nature of space/time.

An "easy" way to understand Kant's Project in the Critique of Pure Reason.
Recommended reading: I don't recommend reading the primary source alone, even the most intelligent person will need a commentary/secondary source. For the person who is simply seeking a decent intro to Kant, I recommend Durant's History of Philosophy or the section on Kant in Coppleston's History of Philosophy. Coppleston's Section on Kant (about 100 pages) is thorough. If you would like to read CPR because you are a grad student or highly interested, I recommend the Smith translation and the commentary by Routledge/Gardner.