Lord Buddha's teachings are the simplest to learn and apply as Buddhism is not a belief like other religions but founded on the enlightened experience of Gautama. Siddhrtha's enquiry started when he found the misery of life at the age of 29.
Here is the logical conclusion of Buddha expressed as 4 Venerable truths:
Truth - 1: Recognise that Life is a Misery
Sounds very pessimistic to a common man as he finds many pleasures of life. It is very difficult to recognise this truth for those who are submerged in carnal pleasures. Think deeply for a moment about the greed, anxiety, fear, insecurity, hatred, lust and dislike of all the people's beheviour we go through in daily life.
If you try hard you will recognise life is by default a misery with occasional sweet spots. Knowing old age, disease & death is inevitable is a good enough reason for misery. Please don't pretend that you will never die as we have all born with the death warrant on hand without date written on it.
Other Venerable truth to follow. Please digest this one before I can serve the next one.
Jai Lord Buddha